Answer:
A
Explanation:
Reduction of the number of sets of chromosomes occurs during:
Answer:
meiosis I
Explanation:
Reduction of the number of sets of chromosomes occurs during meiosis I.
During Meiosis I crossing over of genetic material occurs between chromosome pairs
Match the descriptions to the processes. Ice cream starts dripping down the sides of an ice cream cone. Fog is created by using dry ice. Frost forms on trees on a very cold day. The mirror gets fogged up when you breathe on it. Your wet hair dries after a few minutes. Liquid glass cools and hardens.
the human stomach need to maintain a pH level between 1 and 2 in order to properly digest food. what is true regarding the environment of the human stomach
The environment of human stomach is Acidic.
This environment is perfect for the activation of enzymes that facilitate the breakdown of proteins into smaller protein fragments, which is the first step in digesting food.What is an enzymes?Enzymes are proteins that help speed up metabolism or the chemical reactions in bodies. They build some substances and break others down. All living things have enzymes. Our bodies naturally produce enzymes. But enzymes are also in manufactured products and food.What is a protein?A protein is a naturally occurring, extremely complex substance that consists of amino acid residues joined by peptide bonds. Proteins are present in all living organisms and include many essential biological compounds such as enzymes, hormones and antibodies.To know more about antibodies here
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Explain how adaptive traits ]are important in our constantly-changing the world.
Answer:
The history of life shows that organism evolves with time as a result of changes in their surrounding environment.
The organism evolves to best fit in their changing environment with the mechanism called adaptation. These adaptation takes place due to mutation in their genes and is passed on to their offspring to become established in the population.
The adaptation is the driving force of natural selection which helps in the survival of the fittest organism to their niche. For example, the crocodile is reptile which still exists on this earth from the time of their origin in age of reptiles or Mesozoic era.
Thus, the adaption helps in the survival of the organism.
What are three processes that contribute to genetic variation during sexual reproduction
Genetic variation during sexual reproduction comes from Crossing Over, Independent Assortment, and Random Fertilization. These processes mix up genes to create new combinations, contributing to genetic diversity.
Explanation:Three processes that contribute to genetic variation during sexual reproduction are Crossing Over, Independent Assortment, and Random Fertilization.
Crossing Over occurs during Prophase I of meiosis when homologous chromosomes exchange genetic material. This results in new combinations of genes on each chromosome and contributes greatly to genetic variation.
Independent Assortment happens during Metaphase I of meiosis when tetrads line up at the equator of the cell randomly with respect to each other. This randomness results in each of the four daughter cells created in meiosis having a different set of chromosomes, and thereby different genetic information.
Random Fertilization is the process wherein from millions of possible sperms and eggs, only a single sperm gets to fertilize an egg. This randomness also contributes to the enormous genetic variation seen in sexually reproducing organisms.
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What must be done to breed dogs for a particular trait?
Mate any dogs and see what variations occur.
Place dogs in places where they can acquire the trait.
Mate two dogs that have the desired trait.
Protect dogs with the trait from natural selection.
Answer:
Mate two dogs that have the desired trait
Explanation:
In order to breed dogs for a particular trait one ought to mate two dogs that have the desired trait. This process is referred to as artificial selection or selective breeding.
Selective breeding refers to a process by which new organisms with desirable characteristics or traits are developed. Breeders select two parents having the desired phenotypic trait to reproduce thus yielding offspring with the desired trait.
Answer: Mate two dogs that have the desired trait
Explanation:
Which of the following is the earliest era of Earth's geologic time scale? Cenozoic
Mesozoic
Precambrian
Paleozoic
while washing her hair olivia noticed that she was losing a lot of hair she visited a clinic and the physician reassured her that her hair would grow back how do you think olivias hair will grow back
Olivia's hair will grow back following the natural hair growth cycle and proper scalp and hair care.
When Olivia noticed she was losing hair while washing it, the primary concern could be related to hair health and scalp conditions. The process through which Olivia's hair will grow back involves the natural cycle of hair growth, which includes the phases of anagen (growth), catagen (transition), and telogen (resting), before the hair sheds and the cycle restarts. Hair loss can be normal as part of this cycle, but excessive loss might indicate an underlying issue.
Proper hair care practices are essential for maintaining healthy hair growth.
In an experiment, the hypothesis is If the wavelength of the light shining on a plant is shortened, the rate of photosynthesis is slowed down. If this experiment is performed, the dependent variable _____.
will be the wavelength of the light
will be the plant on which the light is shining
will be the rate of photosynthesis
cannot be determined
Answer:
will be the rate of photosynthesis
Explanation:
A dependent variable in an experiment is the process or factor that is altered or affected by a related factor called the independent variable. In the given experiment, effect of wavelength of light is observed on the rate of photosynthesis in plants.
Here, the rate of photosynthesis is supposed to be changed when the experimental plant is exposed to various wavelengths of light. This makes the "rate of photosynthesis" dependent variable for the experiment as it is affected by the "wavelengths of the light" to which it is exposed.
Given the principle of exclusion, which of these statements is true?
Answer:
we do not have the statements
Explanation:
The Pauli exclusion principle is the quantum mechanical principle which states that two or more identical fermions cannot occupy the same quantum state within a quantum system simultaneously.
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mark brainliest and give thanks
Answer:
u have not mentioned any statement
ok then I am giving u some information may be it help u
Explanation:
The competitive exclusion principle says that two species can't coexist if they occupy exactly the same niche (competing for identical resources). Two species whose niches overlap may evolve by natural selection to have more distinct niches, resulting in resource partitioning.
Which of the following describes how binary fission and mitosis are similar?
A)they are both used for growth or repair
B)they both break down membrane-bound nuclei
C)both invoke the replication of a single stand of DNA
D)Both replicate genetic material
Final answer:
Binary fission and mitosis are similar because both processes replicate genetic material to produce genetically identical daughter cells from the parent cell.
Explanation:
Binary fission and mitosis are similar in that D) Both replicate genetic material. Binary fission is known as cellular cloning in bacterial cells, involving the replication of their single, circular DNA, whereas mitosis involves the replication of multiple chromosomes in eukaryotic cells. Regardless of the complexity or organism type, both processes ensure the production of daughter cells that are genetically identical to the parent cell. This is crucial for asexual reproduction as well as for growth, development, and repair in multicellular organisms.
Creation of an unnaturally uniform sample to represent a diverse population
can be avoided by:
A. including only willing
B. asking another scientist for help.
C. choosing only identical participants.
D. selecting individuals at random.
Answer:
selecting individuals at random.
Explanation:
The creation of an unnaturally uniform sample to represent a diverse population can be avoided by D. selecting individuals at random
What is diverse population?For example, a neighborhood in a Midwestern city might contain several political subdivisions, a Native American group, an Asian and Hispanic population, some small businesses, blue collar workers, a variety of religious groups, student groups and a variety of youth-serving organizations.
What country has the most diverse population?Uganda has by far the highest ethnic diversity rating. In fact, the world's 20 most diverse countries are all African.
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Barbara is converting 78°F to degrees Celsius. First, she subtracts 32 from 78. What is the next step?
Answer:
the next step is to multiply the result by 5/9.
Explanation:
Below, the formula to convert Farenheit degrees to Celcius.
T(°C) = (T(°F) - 32) × 5/9
If barbara already subtracted 32 from 78, now the next step is to multiply the result by 5/9.
T(°C) = (78°F - 32) × 5/9 → T(°C) = (46) × 5/9 = 25.55°C
Answer: A
Explanation:
what is gene flow? Apex
A: selection for average traits
B: when a population splits in two
C: a mutation becoming more common
D: genes moving between two populations
Answer:
gene flow is the transfer of genetic variation from one population to another.
option D
Gene flow is genes moving between two populations.
Gene flow refers to all the mechanisms that generate movement of genes from one population to another.
The populations of a species can exchange genes to a greater or lesser degree, either by nuclear genes or uniparental genomes, as well as by extinction and recolonization events of entire populations.
Gene flow conceives migrant populations that carry different alleles (or different frequencies of the same alleles), which can change the gene and genotypic frequencies of the recipient population.
The study of gene flow is vital in evolutionary biology, since it is an important component in the structure of populations, being a determining factor in the generation of biological diversity of populations.
Therefore, we can conclude that gene flow is genes moving between two populations.
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10.
What is a function of mucus?
It traps pathogens.
It causes disease.
It carries hormones.
It signals phagocytes.
what happens inside muscles when they contract
Answer:
They move their heads protruding out in all directions forming a thick myosin filament.
Explanation:
Please mark brainliest and have a great day!
Answer:
Myosin heads attach to and move along actin-binding sites
Explanation:
I just took the test, and I got 100%!!!
Explain how natural selection works
Answer:
Natural selection. Is based on the theory. Given by Charles Darwin
Explanation:
Natural selection states that "Sirvival of the Fittest "meaning to say that if you are able to make food , compete with the world and cope up with the various environment factor then u can survive else you might get extinct .
Final answer:
Natural selection is a process by which organisms develop traits that help them survive and reproduce. Giraffes evolving longer necks is an example of this process.
Explanation:
Natural selection is a process by which organisms in a population develop traits that help them survive and reproduce. Traits that offer an advantage are more likely to be passed on to offspring, increasing the chances of survival for individuals with those traits.
An example of natural selection at work is the evolution of giraffes. Over time, giraffes with longer necks were better able to reach food sources in tall trees, leading to the survival and reproduction of individuals with longer necks and the increase in the overall population's average neck length.
Which of the following is the best definition of a Eukaryota?
A. a one-celled organism that does not have a membrane-bound nucleus
B. a one-celled organism that does not have a cell wall
C. an organism whose cells each contain a membrane-bound nucleus
D. an organism whose cells each have a cell wall
Answer:
C. an organism whose cells each contain a membrane-bound nucleus
Explanation:
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What do theories hypothesize about the conditions of Earth's early atmosphere?
Answer:
I think it is that organic molecules like carbon combined together using the power for lightning to make inorganic molecules, and amino acids, etc. this can be seen in the Miller-Urey experiment
Explanation:
Answer:
The conditions present on early earth were like: High temperature, reducing atmosphere containing methane, ammonia, etc. and volcanic eruptions.
Explanation:
The gaseous atmosphere which we see today was not present on the early earth. Due to volcanic eruptions, the molten mass was released and moved slowly over the surface of earth. From this molten mass several gases were release into the surroundings such as carbon dioxide, methane, ammonia and water vapor. The ultra violet radiation from sunlight caused the breakdown of water molecules into hydrogen and oxygen. Hydrogen being lighter escaped into the surroundings and oxygen readily combined with other gases to form again H2O, CO2 and many other gases. So we can say that there was no free oxygen available in the early atmosphere and it was reducing in nature. Oxygen also participated in the formation of ozone i.e O3 molecule under the influence of UV rays. These ozone molecules resulted in the formation of ozone layer which acts as a shield to save present atmosphere from harmful UV rays.
Sort the examples by the type of diversity that they exhibit
A park has 80 species of trees
Red, yellow, and orange
bell peppers are all members
of the same species
Individuals of the same
lizard species have
different mating strategies.
Five different bird species are
at a bird feeder.
Genetic Diversity
Species Diversity
Explanation:
Red and yellow bell........... - genetic diversity
A park has....... - species diversity
Five different bird..... - species diversity.
Answer:
Red, yellow, and orange bell peppers are all members of the same species = Genetic Diversity.Individuals of the same lizard species have different mating strategies. = Species Diversity Five different bird species are at a bird feeder. = Species DiversityExplanation:
Genetic diversity refers to any inherited biological variation accumulated during the evolutionary process, generated, fundamentally, by mutation in the nucleotide sequence during DNA replication. In summary, through genetic diversity we can see a biological difference between individuals of the same species. An example of this is: "Red, yellow, and orange bell peppers are all members of the same species ".
Species diversity is the term used to describe the existence of different species of the same animal in an environment. For example, there are different species of ladybug in a garden, even though it is the same animal, each species of ladybug has genetic and morphological differences. Other examples of species diversity are:
Individuals of the same lizard species have different mating strategies. Five different bird species are at a bird feederBrainliest!
What are the advantages of using renewable energy sources instead of fossil fuels? Why didn't you use them?
Do u think people in the future will have homes like the ones you designed? Why or why not?
Advantages of renewable energy sources over fossil fuels and the potential for sustainable home design in the future.
Explanation:Advantages of Using Renewable Energy Sources Instead of Fossil FuelsThere are several advantages of using renewable energy sources over fossil fuels:
It is likely that people in the future will live in homes designed with sustainability and energy efficiency in mind. As the demand for renewable energy grows and technology advances, sustainable practices will become more prevalent in architecture and construction.
Primary Topic: Advantages of Renewable Energy Sources and Future Home Design.
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Which statement describes the reaction for cellular respiration?
The equation is carbon dioxide + water → glucose + oxygen + water and energy is required in the form of light
The equation is glucose + oxygen → carbon dioxide + water and energy is produced in the form of ATP.
The equation is carbon dioxide + water → glucose + oxygen + water and energy is produced in the form of ATP.
The equation is glucose + Exygen carbon dioxide + water and energy is required in the form of light.
Answer:
The equation is glucose + oxygen → carbon dioxide + water and energy is produced in the form of ATP.
Explanation:
The cellular respiration process is the opposite of photosynthesis, so it starts with glucose and O2.
Answer:
The equation is glucose + oxygen → carbon dioxide + water and energy is produced in the form of ATP.
Explanation:
Cellular respiration is a phenomenon that basically consists of the process of extracting chemical energy accumulated in the molecules of diverse organic substances, such as carbohydrates and lipids.
In this process, the oxidation of organic compounds of high energy content, producing carbon dioxide and water, and the release of energy, is used to allow the various forms of cellular work to occur.
The cytoplasmic organelle responsible for this breathing mechanism is the mitochondria, acting as a true power plant.
The equation of cellular respiration is:
glucose + oxygen → carbon dioxide + water and energy is produced in the form of ATP.
By this equation it is possible to verify that the glucose molecule (C6H12O6) is degraded to give relatively simpler substances (CO2 and H2O).
The densest water in the ocean is found ?
Answer:
yes
Explanation:
Surface water is enriched in salt from sea ice formation. Due to its increased density, it flows down the Antarctic continental margin and continues north along the bottom. It is the densest water in the free ocean, and underlies other bottom and intermediate waters throughout most of the southern hemisphere.
Answer:
In the ocean's deepest parts. Just took the test.
Which of the following contributes most to climate change
Can you comment on this answer and leave me the options ...? thank you
Drag each tile to the correct box.
The flu vaccine activates adaptive immunity. How does this occur?
Answer:it is a similar thing to natural selection, the ones less effected by it survive and adapt over time to survive the vaccine. However, google defines it this way, "The adaptive immune system, also known as the acquired immune system or, more rarely, as the specific immune system, is a subsystem of the overall immune system that is composed of highly specialized, systemic cells and processes that eliminate pathogens or prevent their growth"
Explanation:
if the strand of DNA with the sequence TTA mutated to TTG, would this be a silent or missense mutation
Answer:
Missense mutation
Explanation:
When wind creates a sand dune, the sheltered side of the dune _____.
is less steeply sloped than the windward side
has the same incline as the windward side
is more steeply sloped than the windward side
Answer:
is more steeply sloped than the windward side
Explanation:
The wind is the primary agent that moves the sediments and creates sand dunes in the deserts. When the wind starts to slow down it loses its power to carry the sediments so it starts to deposit them. As it does, a hill of sand is starting to form, called a sand dune. The wind will constantly be bringing new sediments, and the windward side is the one that gets them, while the leeward side doesn't. This results in the windward side to be much larger, but also to have much lower angle of fall, while the leeward side is having a very steep slope as it is constantly building on the top, but not the rest of it.
Answer:
C]is more steeply sloped than the windward side
Explanation:
Which statement below accurately describes the process of evaporative cooling?
A. Water condenses on the skin and absorbs heat from the body
B. Water on the skin evaporates into the air, pulling heat from the body
C. Skin cells absorb water into the body, which absorbs heat and cool the cells
D. Water on the skin evaporates into the air, pulling heat out of the air around the body
Final answer:
The process of evaporative cooling is best described by water on the skin evaporating into the air and pulling heat from the body. This cooling effect occurs as the energy required for the water to evaporate draws heat from the skin, leaving the remaining liquid cooler. So the correct option is B.
Explanation:
The statement that accurately describes the process of evaporative cooling is B: Water on the skin evaporates into the air, pulling heat from the body. This process occurs because the evaporation of water requires energy in the form of heat. When the water molecules on the skin gain enough kinetic energy to overcome intermolecular forces, they transition from a liquid to a gas state. In doing so, these molecules draw this energy from the skin, resulting in a cooling effect. Furthermore, the rate of sweat evaporation increases on hot, dry days, while high humidity can reduce this rate, making it harder for the body to cool down effectively.
During this process, the remaining liquid perspiration on the skin has a lower average kinetic energy, leading to a cooler feeling on the skin. While options A, C, and D mention various interactions between water and the body or the surrounding air, they do not accurately describe the phenomenon of evaporative cooling where body heat is used to convert liquid sweat into vapor, which cools the body down.
Final answer:
The correct statement on evaporative cooling is B, where water evaporating from the skin absorbs heat from the body, leading to cooling. The evaporative process is more efficient in lower humidity, while higher humidity slows down this cooling effect.
Explanation:
The statement that accurately describes the process of evaporative cooling is: B. Water on the skin evaporates into the air, pulling heat from the body.
Evaporative cooling occurs when water molecules on the skin or other surfaces gain enough kinetic energy to overcome intermolecular forces and transition from a liquid to a gaseous state. This process requires energy, which is absorbed from the surroundings – in this case, from the body. As a result, the temperature of the remaining liquid on the skin is lowered. This is because the molecules with higher kinetic energy are the ones that evaporate, leaving behind those with less energy, which corresponds to a lower temperature.
In scenarios where the air is less humid, the rate of evaporation is higher due to lower concentration of water vapor in the atmosphere. This leads to more effective cooling of the skin because more sweat can evaporate, taking away additional heat from the body. However, on humid days, the presence of more water in the atmosphere means less sweat can evaporate, which reduces the evaporative cooling effect.
Which of the following is true of clouds at medium altitudes?
A. They are the result of occluded fronts.
B. They do not bring precipitation.
C. They are composed mostly of liquid water.
D. They are the cause of fog.
(Apex)
Answer:
C. They are composed mostly of liquid water.
Explanation:
Medium altitude clouds form between 2000 to 6000 meters. They are majorly composed of liquid water or water droplets. When temperature is cold enough they can be composed of ice crystals too, specially in polar regions.
They are usually of altocumulus and altostratus type. Altocumulus occurs in several layers and can appear as white or grey.It can be in form of sheets, patches or rolls. Altostratus is greyish or bluish and generally indicates the arrival of rain. It partly or totally covers the sky.
the answer is
they are composed mostly of liquid water.
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_______ caused the end of the nomadic lifestyle of ancient humans.
Answer:
Evolution caused the end of the nomadic lifestyle of human beings.
Answer:
Evolution cause the end of nomadic lifestyle of ancient humans.
Explanation:
Nomadic people did not did not farm for food but acquired it as they travelled.This is known as hunter gatherer economy as the name implies.They hunted for food and gathered the food as they travelled. They hunted for food gathered food resources as they became available. So they could not gather all the food and resources they found. Neolithic revolution had changed the society by introducing the new ideas to the people involved in the agriculture. Domesticated animals like dogs and horned cattle were used to improve and simplify agriculture. People which are being nomad which are people who move according to where they can find resources to settling down and starting civilisations. People began to start farms a nd create a surplus food.