Oxygen liberated during photosynthesis comes from
Answer:
Water, during the light-dependent reactions.
Explanation:
During the light-dependent reactions, a photon (particle of energy) from the Sun strikes the pigment molecules in Photosystem I in the thylakoids of chloroplasts. The pigment molecules pass the energy around until it strikes a pair of electrons located where Chlorophyl A is. One electron is "bounced" to the primary electron acceptor. But now it's gone. What replaces it?
The answer is in water. However, water not only provides replacement electrons; it also provides oxygen. When two oxygen atoms accumulate, they are released as a pair. Thus the answer is water. Hope u found this helpful! :)
Oxygen liberated during photosynthesis comes from the photolysis of water molecules.
Explanation:The oxygen liberated during photosynthesis comes from water molecules (H2O) during a process called photolysis.
Light-dependent Reactions: Photosynthesis consists of two main stages: the light-dependent reactions and the light-independent reactions (Calvin cycle). The liberation of oxygen occurs during the light-dependent reactions, which take place in the thylakoid membranes of chloroplasts.
Photolysis: In the light-dependent reactions, light energy is absorbed by chlorophyll and other pigments. This energy is used to split water molecules (H2O) into oxygen (O2), protons (H+ ions), and electrons (e^-).
Oxygen Release: The oxygen atoms from the water molecules are released as molecular oxygen (O2) into the atmosphere. This is the oxygen that we breathe, and it is a byproduct of photosynthesis.
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Which processes are directly responsible for the presence of the different species of wheat and corn shown in the diagram above?
Answer:
I believe its gene manipulation and overpopulation
Explanation:
This cell is a prokaryote. Which evidence could be used to support this classification
Answer:
circular DNA
Explanation:
usatestprep
A prokaryotic cell can be identified by three main characteristics: the absence of a nucleus, the lack of membrane-bound organelles, and their generally smaller size compared to eukaryotic cells.
Explanation:A prokaryote is a type of cell lacking a true nucleus and membrane-bound organelles. This is the most basic and ancient type of cell. There are several pieces of evidence that could support the classification of a cell as a prokaryote.
Firstly, one of the clearest indicators that a cell is a prokaryote is the absence of a nucleus. Prokaryotes have a nucleoid, a region in the cell where the DNA material is located, but it is not enclosed by a nuclear membrane, unlike eukaryotic cells. Secondly, prokaryotic cells lack other types of membrane-bound organelles such as mitochondria, Golgi bodies, and endoplasmic reticulum. They have ribosomes for protein synthesis but these ribosomes are smaller than those found in eukaryotes. Third, the size of the cell can be another indication. Prokaryotes are generally smaller than eukaryotes, often being only 1-10 micrometers in diameter. Learn more about Prokaryote here:https://brainly.com/question/33439033
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If the model Earth acts the same as the real Earth, what will happen as the students spin the model?
A. Different parts of the model Earth will have different seasons.
B. All of the model Earth will have daytime at the same time.
C. A new year will start each time the model Earth makes a complete turn.
D. Some parts of the model Earth will have daytime and some will have night.
Spinning the model Earth results in different parts experiencing day and night, just like the real Earth. The rotation of Earth on its axis causes this alternation of daylight and darkness. Earth's tilt is vital for the seasons; without it, there would be no significant seasonal changes.
Explanation:If the model Earth is spun, the result would be that some parts of the model Earth will have daytime and some will have night, which corresponds to option D. This is because the Earth rotates on its axis, which means that as it turns, different parts of the Earth's surface move into and out of sunlight. Since the model is acting the same as the real Earth, the side facing the light source (simulating the sun) will experience daytime, while the side opposite to the light source will be in shadow and experience night.
The presence of day and night is due to the 24-hour rotation of the Earth on its axis. This rotation alternately exposes one side to sunlight while the other side faces away and is in darkness. Therefore, a complete turn of the model Earth will simulate the alternation of day and night just as it occurs on our planet.
About the seasons and Earth's tilt, if the Earth's axis were not tilted, seasons as we know them would not exist. The 23.5° tilt is responsible for the seasonal changes. Without the tilt, the entire Earth would experience approximately equal day and night throughout the year, similar to equatorial regions. There would be no significant seasonal variation in temperature or daylight hours, and the concept of summer, autumn, winter, and spring would not apply.
Final answer:
When spinning a model Earth, some parts will have daytime while others will have night, reflecting the rotation of the real Earth. This rotation causes the daily cycle of day and night, and the tilt of Earth's axis leads to the changing seasons.
Explanation:
When a student spins a model Earth to simulate the rotation of the real Earth, different parts of the model Earth will experience daylight or nighttime, just as they do on our planet. This is because Earth rotates on its axis every 24 hours, causing different regions to alternately face towards and away from the Sun. This rotation is responsible for the cycle of day and night. So, for a model Earth acting the same as the real Earth, the correct answer is:
D. Some parts of the model Earth will have daytime and some will have night.
The idea of seasons on Earth occurs due to the 23.5° tilt of Earth's axis. This tilt results in varying angles of sunlight and daylight durations during different times of the year, causing seasons. If Earth's axis were not tilted, we would not experience the pronounced seasonal changes that are currently present at different latitudes.
what traits or structures help the plant ensure that it’s pollen is moved to other plants of the same species and that sexual reproduction will happen
Answer:
The structures that helps the plant ensure that it’s pollen is moved to other plants of the same species and that sexual reproduction will happen is the bright colored petals and sterility of carpel.
Bright colors of petals attracts the insects like bees, which helps the plant to transfer its pollen to other flower of the same species. In some plants, pollen matures earlier than its own stigma so the pollen transfer to other flowers.
When can exponential growth happen?
A. When carrying capacity is reached
B. When there are limited resources
C. When there is no competition
D. When the death rate is high
SUB
Answer:
c
Explanation:
there can't be growth if there are not enough resources
Answer:
C. When there is no competition.
& (If you have different options)
When there are unlimited resources.
Explanation:
correct for those option in the biology ap ex quiz/test as of late May 2021
10. How should your microscope be stored when not in use?
Answer:
Always cover the microscope with the supplied dust cover when not in use.
Store in a dry place.
In humid or moist environments, it is advisable to store the microscope in a waterproof container with a drying agent.
Do not touch the optical lens with bare fingers.
Do not store the microscope in direct sunlight.
Explanation:
Final answer:
A microscope should be stored properly when not in use to ensure its longevity and prevent damage. Follow these steps: switch off the microscope, clean the lenses, wrap the cord and cover it, and store it in a safe place.
Explanation:
When not in use, a microscope should be stored properly to ensure its longevity and prevent damage. Here are the steps to follow:
Switch off the microscope: Before storing the microscope, make sure to switch it off to conserve energy and prevent any accidents.Clean the lenses: Use lens paper or Kimwipes to clean all the lenses before putting the microscope away. This helps remove any dirt or smudges that may affect the image quality.Wrap the cord and cover: Gently wrap the cord around the base of the microscope and cover it with its plastic cover. This prevents dust and other debris from entering the microscope.Store in a safe place: Return the microscope to its designated storage place, making sure that the ocular lenses are facing inwards to avoid any damage.What chemical does the liver make?what does it do?
Answer:
The liver continuously filters blood that circulates through the body, converting nutrients and drugs absorbed from the digestive tract into ready-to-use chemicals. The liver performs many other important functions, such as removing toxins and other chemical waste products from the blood and readying them for excretion
Explanation:
When light rays appear to be coming from behind a mirror, what type of image has been formed?
plane
imaginary
virtual
real
Answer:
virtual
Explanation:
Answer:
Virtual
Explanation:
I took the test
how might the sources of food differ from island to island
In terms of biodiversity, islands are special locations that contain a range of creatures and ecosystems for both native and endangered biodiversity. Endemism is typical of many islands. Thus islands are regarded as hot spots for biodiversity from a regional biodiversity viewpoint. In a collective portion of a basic land ecosystem it is much simpler to conserve species diversity than by shielding only one region of an archipelago.
Since every island has a specific variety of plants and animals, it is important that conservationists preserve the entire island chain. Thus allow the sources of food to differ from island to island in an archipelago. The type of producer originated in an island and then the type of consumers consuming it differ from island to island due to huge variety of and different adaptations of organisms.
he Earth is constantly spinning on its axis, like you might spin a basketball on your finger.
It is this spinning of the Earth that causes
A) the summer-time heat.
B) the need for a leap year.
C) the changes in the seasons.
D) the cycle of night and day.
Answer:
the cycle of night and day
hope this helps :p
Explanation:
Answer:
it is d
Explanation:
beacuse the earth is rotating on its axis so the face that's toward the sun is day because its closer to the sun
In this lab, you used a dichotomous key to identify organisms. Why would this skill be valuable to you? Check all possible reasons below.
It helps you classify organisms.
It helps you identify ecosystems.
It helps you study and appreciate biodiversity.
It helps you analyze an organism’s traits.
It helps you understand how organisms interact.
Using a dichotomous key to identify organisms is valuable for classifying organisms, studying and appreciating biodiversity, and analyzing an organism's traits.
Explanation:A skill in using a dichotomous key to identify organisms is valuable for several reasons:
It helps you classify organisms: A dichotomous key allows you to organize and categorize different organisms based on their characteristics. This classification is important for understanding the relationships between different species.It helps you study and appreciate biodiversity: By using a dichotomous key, you can identify and appreciate the wide variety of organisms present in different ecosystems or samples. This understanding of biodiversity is crucial for conservation efforts and understanding the complexity of life on Earth.It helps you analyze an organism’s traits: A dichotomous key requires you to observe and analyze specific traits of an organism in order to identify it. This skill of analyzing traits is important in biology and other scientific fields.Using a dichotomous key to identify organisms is valuable because it helps classify organisms and analyze their traits.
A dichotomous key is a tool used in biology to classify and identify organisms based on their observable characteristics. By following a series of dichotomous choices, such as the presence or absence of specific features, one can narrow down the possibilities and accurately identify the organism.
This skill is valuable for scientists, students, and nature enthusiasts as it allows for the systematic classification of organisms, aiding in the study and appreciation of biodiversity.
Additionally, analyzing an organism's traits through a dichotomous key provides insights into its evolutionary relationships and ecological roles, contributing to a better understanding of how organisms interact within ecosystems.
Enzymes can be affected by acidity and alkalinity. What name is given to the scale that measures acidity and alkalinity?
Answer:pH and poh
Explanation:
Final answer:
The pH scale measures acidity and alkalinity, ranging from 0 to 14, with neutral at 7. It's crucial for understanding enzymatic activity, as changes in pH can alter enzyme function or cause denaturation.
Explanation:
The scale that measures the acidity and alkalinity of a solution is known as the pH scale. This scale ranges from 0 to 14, with values below 7 indicating an acidic solution, values above 7 indicating a basic or alkaline solution, and a value of 7 indicating a neutral solution, like pure water. The pH scale is a critical tool in biochemistry as it helps understand how enzymatic activity can be influenced by the chemical environment, particularly by the concentration of hydrogen ions (H+). A change in pH can affect the ionization of amino acid side groups within the enzyme and its substrate, which can significantly alter the enzyme's function or even result in denaturation, which means the enzyme loses its structure and, consequently, its activity.
a carbon ring structure that contains one or more atoms of nitrogen
Final answer:
A carbon ring structure with nitrogen atoms is known as a nitrogenous base, critical in DNA and RNA as components called purines and pyrimidines, which include bases such as adenine, guanine, cytosine, thymine, and uracil.
Explanation:
A carbon ring structure that contains one or more atoms of nitrogen is typically known as a nitrogenous base, which is an essential component of nucleic acids such as DNA and RNA. In terms of chemistry, these structures are composed of carbon and nitrogen atoms arranged in a ring, with the ability to have various functional groups attached. Two prime examples of nitrogenous bases are purines and pyrimidines, which include bases like adenine (A), guanine (G), cytosine (C), thymine (T), and uracil (U). Both purines and pyrimidines are critical for the structure of nucleic acids, with purines possessing a double-ring structure that includes a six-carbon ring fused to a five-carbon ring. The nucleobase is attached to the 1' carbon atom of a pentose sugar, and this combined with a phosphate group, forms a nucleotide.
which best describes a protein
Answer: C: A chain of amino acids
Explanation:
The statement which best describes a protein is that it's a chain of amino acids.
What is a protein?In Science, a protein can be defined as a hydrophilic, macromolecule (polymer) which is typically formed due to the union of a chain of amino acids.
This ultimately implies that, the statement which best describes a protein is that it's a chain of amino acids, and it consist of the following chemical compounds:
An acidic carboxyl group (COOH).A basic amino group (NH₂).A unique side chain group.Read more on protein here: https://brainly.com/question/19145247
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Which of the following might be expected to decrease the disperal of plant species over a religion?
Answer:
The dispersal of plant species occurs when the seeds of the plants are dispersed over different areas by animal means, wind, insects etc.
If the population of the organisms which help in the dispersal of the seed declines, then the dispersal of the plant species will also decline.
Hence, animals and insects are very important for the dispersal of seeds of plants over a region.
Compare the relationship between elements, atoms, molecules, and compounds.
Answer:
Atoms are the building blocks of elements which means elements made up from large number of atoms having similar size and shape. Compound is made of more than one element which combines in a fixed ratio. The elements inside the compound makes bond with each other. Molecules is also made up of more than one elements. The main difference between molecule and compound is that molecules is formed from same elements while compound is formed from different types of elements.
An ecosystem cannot repair itself
after a volcanic eruption
after a flood
after a tornado
after a houseing development is built
*BRAINLIEST*The diagram below shows the branching tree diagram for humans. The text box below it shows the set of derived shared characteristics for the branching tree.
A slanting, horizontal line is shown. On the extreme left, there is a label that says Common Ancestor. Along the slanting, horizontal line there are five dots labeled from left to right as: 1, 2, 3, 4, and 5. There is one vertical line between each of the consecutive five dots. The lines are labeled from left to right as Perch, Frog, Pigeon, Rats, and Human. A text box below the branching tree diagram is labeled Derived Shared Characteristics. In the box it says from left to right Terrestrial during all stages, Jaws, Walking on two legs, Mammary glands and hair, and Four limbs.
Look at the possible derived shared characteristics, shown in the text box. Think about where these should be placed along the branching tree diagram. Where in the branching tree would you most likely write "lives on land during all life stages"? Explain your answer.
Answer:
I would write "terrestrial/lives on land during all life stages" between the frog and pigeon branches.
Explanation:
Jaw evolution has started with fish, so i'd place that before the perch, evolution of four limbs is next and I would plate it between the perch and the frog. Evolution of an egg has ensured that organisms remain terrestrial during all stages of life and don't need to rely on water to lay their eggs. So I would place that between the frog and the pigeon. True mammary glands and true hair, as we know it formed on mammals so i'd place that between the pigeon and the rats (although synapsids evolved similar structures long before birds even existed). And lastly, I would place "walking on two legs" between rats and human branches. Because our ancestors evolved bipedalism relatively late.
Explanation: 3 because a pigeon, a rat, and a human "lives on land during all life stages".
Correctly label the following anatomical parts of osseous tissue.
The correctly labelled anatomical parts of osseous tissue are mentioned below.
What is an osseous tissue?Osseous tissue, also known as bone tissue, is a type of connective tissue that forms the skeletal system of the body. It is a hard and rigid tissue that provides structural support and protection to the body's internal organs, as well as serving as a site for muscle attachment and bone marrow production.
Numbering is from top to bottom in the blank boxes:
1- Spicules: Tiny, bony projections that resemble needles that are frequently seen in spongy bone.
2- Trabeculae: In spongy bone, these tiny bony plates or struts, which provide bone its structural support, are present.
3- Spongy bone: It has a spongy appearance, which are characterized by trabaculae and spicules.
4- Central canal: It is a tiny canal that is found at the center of the bone
5- Lacuna: These are the spaces in the bone tissue.
6- Collagen fibers: These provide strength and elasticity to the bone.
7- Nerve (right box): It is responsible for transmitting electrical signals.
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The question is incomplete, but most probably the complete question is,
Correctly label the following anatomical parts of osseous tissue.
Osseous tissue is connective tissue in the skeleton that includes long, short, flat, and irregular bones. Compact bone, with osteons, forms the outer layer, while spongy bone features trabeculae within.
Osseous tissue, also known as bone tissue, is a type of connective tissue that comprises specialized cells, mineral salts, and collagen fibers. It provides structural support and protection to the body. The human skeleton includes various types of bones such as long bones, short bones, flat bones, and irregular bones. Compact bone tissue, made up of osteons, forms the dense external layer of bones, whereas spongy bone tissue consists of a web-like structure called trabeculae and is found inside the bones.
To correctly label the anatomical parts of osseous tissue, one might start by obtaining a cross-section of a bone, such as the femur, either intact or cut along its longitudinal axis. Key structures to identify and label could include osteons, the central canal, lamellae, and osteocytes in lacunae. Additionally, for the human skeleton, it’s critical to distinguish between the axial skeleton, which includes the skull, vertebral column, and rib cage, and the appendicular skeleton, which comprises the limbs and girdles.
2 Points
What is the term for the tiny air sacs in the lungs?
O
A. Alveoli
O
B. Bronchioles
O
c. Capillaries
O
D. Trachea
Answer:
A
Explanation:
Answer: A). Alveoli
Explanation: Alveoli are important part of the respiratory system. They are tiny air sacs located at the end of the bronchioles in the lungs which functions in the exchange of oxygen and carbon dioxide. Alveoli is the plural of alveolus, and they are sites for the exchange of oxygen and carbon dioxide in the lungs. Deoxygenated blood is transported from the heart to the alveoli in the lungs through the pulmonary artery where carbon dioxide is unloaded from the red blood cells and oxygenated is loaded. The blood leaving the lungs becomes oxygenated and are transported to other parts of the body. Alveoli functions in getting oxygen into the blood stream and removing carbon dioxide from the blood stream.
what chemical caused the decline of the eagle population
The chemical that caused the decline of the eagle population is dichloro-diphenyl-trichloroethane
What is dichloro-diphenyl-trichloroethane?Most biologists now agree that DDT (or dichloro-diphenyl-trichloroethane) contributed to the fall of bald eagle and other bird-of-prey species (such as ospreys and brown pelicans). In agriculture, dichlorodiphenyltrichloroethane, or DDT, is an insecticide. In 1972, the United States outlawed the use of DDT. DDT is still used in several non-US nations to control malaria-transmitting mosquitoes.
The first action taken by the new EPA was to outlaw DDT because of worries about potential health risks to humans as well as environmental damage. Additionally, data connected DDT to dramatic drops in bald eagle populations as a result of thinner eggshells.
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An object's mass is a measure of how much matter makes it up. An object's weight is a measure of the gravitational force that acts on it. An object's mass is always _______ its weight.
A.
double
B.
equal to
C.
half of
D.
proportional to
Answer:
D. Proportional to
Explanation:
Study island
Answer:
proportional to
Explanation:
An object's weight depends directly on its mass. The greater its mass is, the greater its weight will be. In other words, an object's mass is proportional to its weight.
what structures are formed from rapidly cooling lava in the ocean?
Pillow lavas are sack-like structures formed from rapidly cooling lava in the ocean.
What is cooling lava in the ocean?Pillow lavas, sack-like structures formed when flows of basaltic lava are extruded into the ocean, a deep lake, or a water-filled tunnel within the ice, are seen on the steep slopes of volcanoes.
Pillow basalt commonly develops at mid-ocean ridge volcanoes or oceanic hot-spot volcanoes, like those that created the Hawaiian Islands. The most prevalent rock in the crust of the Earth is basalt, which also serves as the crust of all ocean basins.
Therefore, Pillow lavas structures formed when flows of basaltic lava in the ocean, which develop at mid-ocean ridge volcanoes.
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Why is incomplete dominance considered an exception to Mendel's principles of inheritance?
Answer:
Explanation:
Mendel believed that all units of inheritance are passed on to offspring unchanged. Unstable alleles are an important exception to this rule. The phenotype of an individual is not only the result of inheriting a particular set of parental genes.
Answer:
Mendel believed that all units of inheritance are passed on to offspring unchanged. Unstable alleles are an important exception to this rule. The phenotype of an individual is not only the result of inheriting a particular set of parental genes.
Explanation:
The interaction of substances A and B is an example of
Answer:
how can we know the substance if u didn't attach any diagram to this question
Final answer:
The interaction of substances A and B in chemistry typically refers to a combination reaction where they form a single product, C. This process can include intermediate steps and is influenced by thermodynamic factors such as solubility, temperature, pressure, and concentration.
Explanation:
The interaction of substances A and B could be exemplified in various scenarios within chemistry. Combination reactions occur when two or more reactants interact to form a single substance, such as A and B forming C. In another context, A and B could represent molecules such as an enzyme and its substrate or a ligand and receptor, which bind together to form a specific product. Sometimes, these reactions involve intermediate steps or may involve competing pathways, where a reactant like A could react with B or C resulting in different products.
It is also important to consider thermodynamic factors when mixing substances like A and B that aren't very soluble in each other. Their solubility or lack thereof can influence the direction and extent of their chemical interaction. Factors like temperature, pressure, and concentration, as pointed out in the various examples provided, play critical roles in determining the rates and outcomes of the reactions.
Which organism in the food web below is found in the first trophic level of the
ecosystem?
boa constrictor
beetle
coati
poison dart frog
sloth
strangler fig
fungus
fruit bat
A. Fungus
B. Fruit bat
C. Strangler fig
D. Sloth
Answer:
C. Strangler fig
Explanation:
the first trohphic level contains only the produsers of the ecosystem the prdoduser in the question is the strangler fig making the answer C
Among the options given, the strangler fig is found in the first trophic level of the ecosystem. It is a primary producer that utilizes photosynthesis to manufacture its own food. Other animals in the ecosystem feed on it directly or indirectly.
Explanation:In a food web, the organism found at the first trophic level is always a primary producer. This means it is an organism that can manufacture its own food usually through the process of photosynthesis. In this particular scenario, among the options given, the primary producer is the strangler fig. The strangler fig utilizes sunlight to create its own food in the form of glucose using the process of photosynthesis, thereby positioning it at the first trophic level of the ecosystem. Other animals like beetles, sloths, and fruit bats, etc. feed on the strangler fig directly or indirectly, making it a vital part of the food web.
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Is the EARTH flat or round? really deep question don't make fun of it cuz there are too many contradiction
Answer:
Round
Explanation:
The Earth is round ,even though there are many contradictions. The Earth spins on an axis, which is why there are different time zones all around the world. If the world was flat, then an Earth's core wouldn't exist and also the laws of gravity would not make since due to the Earth being considered flat. People would never know if they met the end of the Earth, or if they walked off the face of the Earth. Also note that if the Earth was flat then our Solar System would have to be flat since it involves the planets to revolve around the Sun.
Answer:
The Earth is technically an ellipsoid.
Explanation:
While the Earth appears to be round when viewed from the vantage point of space, it is actually closer to an ellipsoid. However, even an ellipsoid does not adequately describe the Earth’s unique and ever-changing shape.("Is the Earth round?") If the Earth were flat, then many of the things we know and love today would be gone. The tides, the moon, the atmosphere, etc.
Scientists have proven the weakening of the ozone layer.
True
False
How deep of a diffusion does is meet to needs of living cells?
Diffusion is the net movement of anything (for example, atom, ions, molecules) from a region of higher concentration to a region of lower concentration. Diffusion is driven by a gradient in concentration.
The concept of diffusion is widely used in many fields, including physics (particle diffusion), chemistry, biology, sociology, economics, and finance (diffusion of people, ideas, and price values). The central idea of diffusion, however, is common to all of these: an object (for example, atom, idea, etc.) undergoing diffusion spreads out from a point or location at which there is a higher concentration of that object.
A gradient is the change in the value of a quantity, for example, concentration, pressure, or temperature with the change in another variable, usually distance. A change in concentration over a distance is called a concentration gradient, a change in pressure over a distance is called a pressure gradient, and a change in temperature over a distance is called a temperature gradient.
The word diffusion derives from the Latin word, diffundere, which means "to spread out."
A distinguishing feature of diffusion is that it depends on particle random walk, and results in mixing or mass transport without requiring directed bulk motion. Bulk motion, or bulk flow, is the characteristic of advection.[1] The term convection is used to describe the combination of both transport phenomena.
If a diffusion process can be described by Fick's laws, it's called a normal diffusion (or Fickian diffusion); Otherwise, it's called an anomalous diffusion (or non-Fickian diffusion).