Answer:
Both bacteria and blue algae are prokaryote organisms, meaning that they do not have a differentiated nucleus, and therefore they are more primitive. But blue algae are able to perform photosynthesis and so we can believe that the first forms of life on Earth date even further back than 3 and a half billion years ago.
Explanation:
The earliest organisms to evolve were single-celled prokaryotes such as bacteria and archaea. These organisms emerged around 3.5 billion years ago and played a crucial role in the development of more complex forms of life.
Explanation:The earliest organisms to evolve were single-celled prokaryotes such as bacteria and archaea. These organisms are believed to have emerged on Earth around 3.5 billion years ago. They were able to survive and thrive in diverse environments, leading to the development of more complex forms of life over time.
For example, cyanobacteria, a type of bacteria, played a crucial role in the evolution of our atmosphere by producing oxygen through photosynthesis. This paved the way for the emergence of more complex organisms, including eukaryotes.
Overall, the early organisms that evolved were simple and unicellular, laying the foundation for the diversity of life we see today.
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Which statement describes the role of phloem within a plant?
Answer:
transport food upward and down
Explanation:
Answer:
C) It transports food to all the parts of the plant only in the downward direction.
Explanation:
Phloem is a conductive tissue specialized in transporting the so-called elaborated sap. Phloem circulates water, carbohydrates, amino acids, lipids, hormones, vitamins, among other substances. This tissue occurs in all organs of the plant. The elaborated sap is the result of the photosynthesis process that is carried out on the leaves, for this reason, the phloem transports food in a downward direction. The tissue that carries food upward is the xylem.
Phloem is a complex tissue, that is, it is formed by several cell types. They are: sieved elements, companion cells, parenchymal cells, fibers and sclereids.
Need help asap!!! plzz (SCIENCE)
What term do scientists use to describe the chemical process in which oxygen and glucose react to release energy inside body cells?
(A)exhaling
(B)breathing
(C)inhaling
(D)respiration
Answer:
D. Respiration
Explanation:
D Respiration Because of your respiratory
What’s the role of oxygen in cellular respiration
Answer: A
Explanation:
Answer:
A
Explanation:
Which organelle provides protections and support to a cell? Cell wall, Cytoplasm, Nucleus, Ribosome
Answer:
The answer is a cell wall.
Explanation:
Cytoplasm is the organelle that keeps the other organelles together. The nucleus is the cell that conducts and instructs the cells activities. The ribosome contains RNA. Cell wall is the most reasonable.
Answer: A cell wall :)
Explanation:
I did the quiz with a 100%
Where is over 95% of incoming ultraviolet radiation absorbed
Answer:
The ozone and the atmosphere
Explanation:
Over 95% of incoming ultraviolet radiation is absorbed by the ozone layer in the stratosphere.
The ozone layer, located in the stratosphere at an altitude of approximately 10 to 50 kilometers (6 to 31 miles) above the Earth's surface, plays a crucial role in absorbing and filtering out harmful ultraviolet (UV) radiation from the sun. Ozone (O3) molecules are formed in the stratosphere through the photodissociation of molecular oxygen (O2) by solar UV radiation. The oxygen atoms produced then combine with other oxygen molecules to form ozone.
The ozone layer has a peak concentration of ozone at an altitude of approximately 20 to 25 kilometers (12 to 16 miles). In this region, ozone molecules effectively absorb and scatter much of the incoming UV-B and UV-C radiation from the sun. UV-B radiation is particularly damaging to living organisms and is known to cause skin cancer, cataracts, and harm to marine ecosystems.
The absorption of UV radiation by the ozone layer is crucial for protecting life on Earth from excessive exposure to harmful UV rays. Without the ozone layer, much more UV radiation would reach the Earth's surface, leading to increased risks of UV-related health issues and environmental damage.
However, the ozone layer has been threatened by human-made substances, such as chlorofluorocarbons (CFCs) and other ozone-depleting substances (ODS), which have led to the thinning and depletion of the ozone layer. International efforts, such as the Montreal Protocol, have been successful in phasing out many ODS, leading to gradual recovery of the ozone layer in recent years. Protecting and preserving the ozone layer remains a critical environmental goal to ensure the continued protection of life on our planet from the harmful effects of UV radiation.
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Which of the following is true of conifers?
a.Female cones produce pollen that fertilizes the egg.
b.Most coniferous trees have both male and female cones.
c.Male cones cannot produce pollen unless fertilized by the female cone.
d.Female cones produce pollen that is trapped by the male cones’ scales.
Answer:
The correct answer would be option B.
Explanation:
Coniferous trees carry both male and female sporophylls cones on the same mature sporophyte mostly. Conifers are monoecious plants because the bear both male and female cones such as pines. Pines, generating 2 different types of spores: female megaspores and male microspores.
Male cones are smaller in comparison of female cones. Scale present in a male cone contains the pollen that can reach to a female cone to make a egg or seed.
Thus, the correct answer is option b.
Answer:
Most coniferous trees have both male and female cones.
Explanation:
Your welcome.
What is a gene?
A- a section of a protein that codes for DNA
B- the alternate version of a trait
C- the visible trait in the F1 generation
D- a section of DNA that codes for a specific trait
A gene is a section of DNA that codes for a specific trait or protein. It provides instructions for the production of a protein, determining an organism's traits. The correct answer to the original question is (D).
Explanation:A gene is a section of DNA that codes for a specific trait, so the correct answer to your question is (D). The primary function of a gene is to provide instructions for the production of a specific protein or a set of closely related proteins, which in turn determines an organism's traits. For instance, a gene in peas could be responsible for whether the peas are yellow or green. This DNA sequence is transcribed into mRNA, which is then translated into protein sequences. Thus, the gene (DNA) acts as the blueprint, guiding the cellular machinery to build proteins.
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what physical property is used to identify matter based on solubility
Ability to dissolve:)
When hydrogen and oxygen combine to create water the _______ are shared between the atoms in the newly formed compound
A) protons
B) neutrons
C) orbitals
D) valence electrons
Answer:
Valence electrons.
Explanation:
Electron, proton and neutron are the sub atomic particles of the atoms. The electrons revolve around the nucleus whereas the protons and neutron remains inside the nucleus.
The water contains hydrogen and oxygen. The electrons are shared between the hydrogen and oxygen to form the new compound water. The electrons participate in the formation of compound because they are present outside the nucleus.
Thus, the correct answer is option (D).
what are aquatic biomes ?
Answer:
Here are a few examples:
lakes/ponds.
rivers/streams.
estuaries.
wetlands.
intertidal regions.
Aquatic regions house numerous species of plants and animals, both large and small. ... The aquatic biome can be broken down into two basic regions, freshwater (i.e, ponds and rivers) and marine (i.e, oceans and estuaries). Freshwater Regions. Freshwater is defined as having a low salt concentration—usually less than 1%
Scientists suspect that modern horses have different dietary habits than horses that lived long ago. Which of the following would be best for a scientist to do to determine whether the dietary habits of horses have changed over time?
A. study the diet of modern horses
B. compare the teeth of modern horses to the teeth of modern donkeys
C. study the overall anatomy of a modern horse
D. compare the teeth of modern horses to fossilized teeth from ancient horses
(D)
Explanation:The teeth of an organism determine the type of diet it has. Through the domestication of the horse, humans have changed its diet over millennia depending on the climate and occupation.
Answer:
Letter D.
Explanation:
TTo determine the change in dietary habits of horses, the best approach from the ones presented is to compare dental features. Teeth can give different pieces of information. The structure of teeth makes it possible to find traces of the food eaten. The same structure also gives information about the food eaten thanks to the shape and borders of teeth.
Studying the diet of modern horses only gives information of the present.
Comparing teeth of horses and donkeys also focuses on the present only. In addition, it adds an element not related to the research (donkeys).
Studying the whole anatomy of a modern horse gives too much information, and all of it about the modern horse only.
Answer the following questions in the picture
C, D, B, B, C are the answers from 5-9
Place the organisms in the correct locations in this food web.
Answer:
Explanation:
green plant beside mouse.......eagle by snake.......goat behind jackal............lion in front of jackal
Answer:
Look at the picture for the answer
Explanation:
Which of these events occurred during the Precambrian time?
Cyanobacteria filled the water and air with oxygen.
Early humans began to make tools, harvest plants, and make cave paintings.
Pangaea, the super continent, was formed.
Pangaea began to break apart into many continents separated by shallow seas.
Cyanobacteria. The Cambrian explosion wouldn’t have happened without so much oxygen that the Cyanobacteria created
Answer:I believe the answer is the first one Cyanobacteria filled the water and air with oxygen
Explanation:
WILL GIVE YOU TGHE BRAINIEST
How does heat capacity affect temperature change?
Answer:
The heat capacity is the slope of the plot of internal energy U with temperature T. The internal energy is energy that due to the rotation and vibrational energy a molecule possesses and as the temperature increases more rotational and vibrational energy levels becomes excited and so the internal energy increases.
Explanation:
Only small amounts of enzymes are required for reactions within cells because enzymes are______
A.fragile
B.reused
C.small molecules
D.constantly synthesized
-Hello There-
Great Question! The Answer To This Question Would Be "B"
Have A Great Day!
Answer: B. reused
Explanation:
Enzymes act as catalyst that speed up the rate of chemical reactions.
They are usually not changed during reactions, that is why it is required in small quantities in the cell since they are not altered and can be reused over and over again.
What is the relationship between temperature and the dissolution of ocean water salts?
Answer: Direct proportion. The salinity of water in the ocean rises with higher temperature because water is evaporated from the ocean, leaving more solutes (salts) in it.
i hope this helps you if it does please mark brain list i really need it to level up :)
A positive relationship is shared between the temperature and saltiness of the oceans waters. As density increases, the saltiness in oceans waters does too.
Saltiness descreases when polar caps melt or increases from the freezing of polar caps. Evaporation can increase saltiness and density too and in turn freshwater decreases saltiness and density.
(Sorry this is all I could find about relationships between the oceans waters and the dissolution in oceans water salts. (
I found the answers on marinebio.org and I am claiming here that these answers are not my own but information I found from this site and I hand all credibility to the author whom published this page on this site)
when does an object break up due to gravity and tidal forces as it approaches a planet?A) when it moves past the planet very quickly B)when it passes the Roche limit C) when its density is very high D) when it becomes tidally locked to the planet
Answer:
B)when it passes the Roche limit
Explanation:
The Roche limit is the distance within which a celestial body that is held by its own gravitational forces shall disintegrate.
This is due to the effect of another celestial body exceeding the self attraction gravitational force held by the first celestial body.
Objects disperse and form rings in the orbit at the Roche limit.
Outside the Roche limit the objects tend to coalesce
Answer:
B) when it passes the Roche limit
Explanation: The Roche limit is the distance within which a celestial body that is held by its own gravitational forces shall disintegrate.
This is due to the effect of another celestial body exceeding the self attraction gravitational force held by the first celestial body.
Objects disperse and form rings in the orbit at the Roche limit.
Outside the Roche limit the objects tend to coalesce
differentiate between homodont and heterodont
Answer:
HOMODONT: Homodont are the animals which have similar kind of teeth.
For example: lizards, frogs, dolphins, etc.
HETERODONT: Heterodont are the animals which have different kinds of teeth.
For example: man, dog, rabbit, etc.
An explanation for the difference in amino acids between lamprey hemoglobin and human hemoglobin is
Explanation:the haemoglobin of lamprey is different from that of humans as it consists of characteriatics partly of vertebrates and partly of invertebrates.
It has a molecular weight equal to that of muscle haemoglobin but it is found to be very efficient in oxygen transport.
The haemoglobin in the oxygenated form is monomeric and undergoes association with diamers and Tetramers when they undergo disassociation.
What characteristic makes osmosis different from diffusion?
A: Osmosis occurs through a semipermeable membrane. Diffusion occurs through a permeable membrane.
B: Net movement in osmosis is from areas of higher concentration to areas of lower concentration. Net movement in diffusion occurs from areas of higher concentration to areas of lower concentration.
C: Osmosis requires facilitation by an energy-carrying molecule, such as ATP. Diffusion requires no additional energy to move molecules across the concentration gradient.
D: Osmosis is used for gases, such as oxygen and carbon dioxide. Diffusion is used for water that contains salt or sugar molecules.
A.Osmosis occurs through a semi permeable membrane. Diffusion occurs in permeable membrane.
Which element is found in nucleic acids but not in proteins?es each amino acid unique?
Answer:
Phosphorus
Explanation:
Nucleic acids are among the four major biomolecules, others being proteins, carbohydrates and lipids.Nucleic acids include DNA and RNA and are made up of nucleotide bases. Nucleotide bases are made up of a sugar, phophate group and a base. Nucleic acids differ from the other three biomolecules in that they contain element phosphorus while carbohydrates, proteins and lipids does not.which of the following is NOT one of myers’s 10 suggestions for a Happy Life ?
Answer:
this is the suggestions for a happy life by Myer's because you didn't give anything.
Explanation:
Want a Happier Life?
Realize that enduring happiness doesn't come from success. People adapt to changing circumstances—even to wealth or a disability. Thus, wealth is like health: its utter absence breeds misery, but having it (or any circumstance we long for) doesn't guarantee happiness.
Take control of your time. Happy people feel in control of their lives. To master your use of time, set goals and break them into daily aims. Although we often overestimate how much we will accomplish in any given day (leaving us frustrated), we generally underestimate how much we can accomplish in a year, given just a little progress every day.
Act happy. We can sometimes act ourselves into a happier frame of mind. Manipulated into a smiling expression, people feel better; when they scowl, the whole world seems to scowl back. So put on a happy face. Talk as if you feel positive self-esteem, are optimistic, and are outgoing. Going through the motions can trigger the emotions.
Seek work and leisure that engages your skills. Happy people often are in a zone called "flow"—absorbed in tasks that challenge but don't overwhelm them. The most expensive forms of leisure (sitting on a yacht) often provide less flow experience than gardening, socializing, or craft work.
Join the "movement" movement. An avalanche of research reveals that aerobic exercise can relieve mild depression and anxiety as it promotes health and energy. Sound minds reside in sound bodies. Off your duffs, couch potatoes.
Give your body the sleep it wants. Happy people live active vigorous lives yet reserve time for renewing sleep and solitude. Many people suffer from a sleep debt, with resulting fatigue, diminished alertness, and gloomy moods.
Give priority to close relationships. Intimate friendships with those who care deeply about you can help you weather difficult times. Confiding is good for soul and body. Resolve to nurture your closest relationship by not taking your loved ones for granted, by displaying to them the sort of kindness you display to others, by affirming them, by playing together and sharing together. To rejuvenate your affections, resolve in such ways to act lovingly.
Focus beyond the self. Reach out to those in need. Happiness increases helpfulness (those who feel good do good). But doing good also makes one feel good.
Keep a gratitude journal. Those who pause each day to reflect on some positive aspect of their lives (their health, friends, family, freedom, education, senses, natural surroundings, and so on) experience heightened well-being.
Nurture your spiritual self. For many people, faith provides a support community, a reason to focus beyond self, and a sense of purpose and hope. Study after study finds that actively religious people are happier and that they cope better with crises.
Intro to Psychology final.
4. d. Focus on other people.
It is easy to confuse this because Myers' has something similar on the list but d is the right answer.
Of the following elements, which is the MOST reactive?
A. F
B. Cl
C. Ar
D. Ne
We can exclude Argon (Ar) and Neon (Ne) they are both very stable. Chlorine (Cl) is reactive but not as much as Fluorine (F). So my answer would be A.
(A)
ExplanationReactivity is an elements ability to gain an electron. So the better it is at "stealing" electrons, the more reactive it will be. The thing that makes fluorine so reactive is its electronegativity. Therefore, since fluorine has a higher electronegatvity than chlorine, fluorine is more reactive.
Explain why washing hands can prevent the spread of disease
Not washing hands harms children around the world
About 1.8 million children under the age of 5 die each year from diarrheal diseases and pneumonia, the top two killers of young children around the
world.
Handwashing with soap could protect about 1 out of every 3 young children who get sick with diarrhea and almost 1 out of 5 young children with respiratory infections like pneumonia.
Although people around the world clean their hands with water, very few use soap to wash their hands. Washing hands with soap removes germs much more effectively.
Handwashing education and access to soap in schools can help improve attendance.
Good handwashing early in life may help improve child development in some settings.
Estimated global rates of handwashing after using the toilet are only 19%.
Not washing hands harms children around the world
About 1.8 million children under the age of 5 die each year from diarrheal diseases and pneumonia, the top two killers of young children around the
world.
Handwashing with soap could protect about 1 out of every 3 young children who get sick with diarrhea and almost 1 out of 5 young children with respiratory infections like pneumonia.
Although people around the world clean their hands with water, very few use soap to wash their hands. Washing hands with soap removes germs much more effectively.
Handwashing education and access to soap in schools can help improve attendance.
Good handwashing early in life may help improve child development in some settings.
Estimated global rates of handwashing after using the toilet are only 19%.
As intense pressure is placed on the planet's limited resources, businesses are again turning to technological innovation. New and emerging technologies like those listed above should see human civilization through the 21st century and into the next with adequate supplies of __________ for people of all nations.
Answer:
technology
Explanation:
Technological innovation plays a crucial role in ensuring the sustainability of our planet's resources in the face of increasing demand and finite supplies. It is hoped that technology will allow the equitable distribution of essential resources such as food, water, and energy to sustain human civilization, yet a balance must be maintained, acknowledging the Earth's resource limits.
Addressing Resource Sustainability Through Technological Innovation
As human civilization progresses into the 21st century, there is a pivotal role that technological innovation plays in ensuring the sustainability of our planet's resources. Balancing the increasing pressures from population growth and the escalating demand for commodities, technology stands as both a beacon of hope and a field replete with challenges. Despite the socio-economic and environmental constraints, optimists believe that ongoing advancements in technology will bolster our capacity to maintain and distribute essential resources such as food, water, and energy to accommodate everyone across the globe. With the integration of sustainable practices and effective resource management, technology could indeed facilitate the fulfillment of human needs without depleting our natural assets.
However, this optimism is checked by voices cautioning against unfettered reliance on technology. Acknowledging that the Earth's resources are finite, it is imperative to consider the limitations of technology and recognize the need for a cultural shift towards sustainable living and reduced consumption, especially in affluent nations. As we continue to navigate the realities of the Anthropocene, a term that denotes the significant impact of humans on Earth's geology and ecosystems, it becomes evident that the alignment of technological development with sustainability principles holds the key to a viable future for all nationalities.
most asteroids _______.
1. revolve around Jupiter
2. are made of frozen gas and ice
3. are found between Mars and Jupiter
4. generate their own heat through nuclear fusion
?¿
Answer:
Explanation:
Asteroids do not revolve around Jupiter. Jupiter has its own moons and that is all that revolves around it that is easily visible.
Not all are made that way. In fact most are made out of rocks.
Three is correct. That's where they are.
Four is just absurd. If the earth can't do it, the other planets can't either.
Answer:
3. Are found between Mars and Jupiter
Explanation:
The person who answered this first is tottaly correct!
The pelican's beak is adapted for _________ in __________ .
A) fishing; coastal waters
B) hunting; wooded habitat
C) catching insects; plains.
D) fishing; mountain streams
Answer:
Option A, fishing; coastal waters
Explanation:
Pelicans are type of birds which have pouch like beak which have the ability to expand to catch the fish.
A pelican usually goes to coastal areas for fishing, it fills its expanded pouch with fish and water. Once the pouch is filled, it squeezes out the water and the fishes left out are swallowed.
American white pelican uses beaks to scoop up the fish.
The correct answer is option A, fishing; coastal waters
How does the circulatory system interact with the muscular system
The circulatory system provides oxygen and nutrients to the muscles and removes waste products. During exercise, the circulatory system increases blood flow to the working muscles.
Explanation:The circulatory system interacts with the muscular system by providing the necessary blood supply to deliver oxygen and nutrients to the muscles, while also removing waste products such as carbon dioxide. The heart, which is part of the circulatory system, pumps oxygenated blood to the muscles through the arteries. The blood vessels in the muscular system, known as capillaries, then facilitate the exchange of oxygen and nutrients with the muscle cells.
The interaction between the circulatory and muscular systems is crucial during exercise. When muscles contract during physical activity, they require more oxygen and nutrients. The circulatory system responds by increasing the heart rate and dilating blood vessels to deliver a higher volume of blood to the working muscles. This increased blood flow helps to maintain muscle function and prevent fatigue.
organisims that are photosynthetic are classified as
Answer:
Photosynthetic Organisms are classified as Photo-autotrophs.
Explanation:
Autotrophs are those organisms that can produce their own food and also called primary producers. While photo-autotrophs are those that use the process of photosynthesis to produce food. The common examples of photo-autotrophs are plants and Cyanobacteria.
Photosynthesis is a procedure in which an organism produces energy in the form of food using sunlight, water, carbon dioxide and Chlorophyll. The main products of photosynthesis are glucose and Oxygen.