Allele frequencies in a population may change due to four fundamental forces of evolution: Natural Selection, Genetic Drift, Mutations and Gene Flow. ... Two of the most relevant mechanisms of evolutionary change are: Natural Selection and Genetic Drift.
What is the total numbet of atoms in Oxygen?
P.S. is the table above right?
The molecule of Oxygen has 2 Oxygen atoms.
Please correct any mistakes in my answer..Glad to help ya! :)
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Astronauts experience similar feelings of dizziness and disorientation upon arrival in space and upon their arrival back on Earth. What does this indicate to researchers?
Final answer:
Dizziness and disorientation felt by astronauts indicate their bodily sensitivity to changes in gravity when transitioning between Earth and space, where they experience microgravity conditions leading to muscle atrophy and bone loss.
Explanation:
The sensations of dizziness and disorientation astronauts experience upon entering space and returning to Earth indicate that the human body is sensitive to changes in gravity fields and acceleration. In space, astronauts experience weightlessness or microgravity because they are in a state of constant free-fall towards Earth, similar to how passengers might feel if an elevator cable snaps or in a plane in descent. This creates an environment where the gravitational force is still present but does not give the sensation of weight. Furthermore, this microgravity condition can lead to significant physiological changes such as muscle atrophy and bone loss, which researchers continually study to better understand and mitigate.
Extended periods of living in a microgravity environment pose challenges, such as the atrophy of muscles and the loss of bone mass due to the lower mechanical demands on the body compared to Earth's gravity. Understanding the effects of microgravity is crucial for planning longer space missions and ensuring the health and safety of astronauts. Cardiovascular adaptations also occur due to the absence of gravity-induced pressure differentials in the body's blood distribution, affecting heart function.
which never changes during physical change
It only affects the form of the chemical substance but not the chemical composition.
Hope that helps :)
Final answer:
During a physical change, the chemical composition, mass, number of atoms, and number of molecules of a substance remain unchanged. Key properties, such as color and boiling point, typically do not alter in a physical change because no chemical bonds are broken or formed.
Explanation:
During a physical change, certain properties of substances are consistent and do not change. These include the chemical composition of the substance, as well as the mass, the number of atoms, and the number of molecules involved. Physical properties that do not alter during a physical change can include color, boiling point, and state of matter, as no bonds are broken or formed during the process. Examples of physical changes include melting, freezing, and tearing.
A key concept to understand is the conservation of mass, which states that in a closed system, the mass of the substances will remain constant, regardless of the physical changes they undergo. Matter can change its form—such as ice melting into water—but it cannot be created or destroyed. This principle is a cornerstone of physical science and supports the idea that during physical changes, certain properties remain unchanged.
A mutation occurs that prevents a cell from taking in the glucose that it needs for energy production. What most likely to happen?
The cell will die. Because if the cell can not take the glucose and it can not get energy from it. So the activities that can support the normal life of the cell will not continue.
When of the following is NOT a type of valve in the heart: Tricuspid Semilunar Bicuspid Arterial
The heart has three types of valves:
Tricuspid valve—located between the right atrium and the right ventricle
Bicuspid valve—located between the left atrium and the left ventricle
Semilunar valves—located between the right ventricle and the pulmonary artery, and also between the left ventricle and
the aorta
When of the following is NOT a type of valve in the heart? Arterial
How do scientists use creativity
Answer:
they can do new things to find stuff
Explanation:
Question: How do scientists use creativity in their careers?
OPitions:
Devising a hypotheses involves creating new explanations for phenomena.
The most important part of an experiment is how colorfully the data is displayed.
Scientific results must be explained in a creative, exciting way.
Scientists judge each others' work based mostly on how creative it is.
What is endosymbiosis?
symbiosis in which one of the symbiotic organisms lives inside the other
Endosymbiosis is a symbiotic relationship where one organism lives inside another, both benefiting, which led to the evolution of mitochondria and chloroplasts in eukaryotes.
Endosymbiosis is a mutualistic relationship in which one organism, typically a single-celled one, lives inside another. This symbiotic relationship is not only beneficial for both organisms involved, but it also played a crucial role in the evolution of eukaryotic cells. It is through endosymbiosis that organelles such as mitochondria and chloroplasts are believed to have originated.
Examples of endosymbiosis include the microbes that produce vitamin K within the human gut. These microbes are protected within this environment and, in turn, provide a vitamin that humans cannot synthesize on their own.
The state of matter that exists only at extremely low temp is called Bose Einstein
The state of matter that exists only at extremely low temp is called Bose Einstein condensate
What factors affect population size
Abundant resources
Food availability
Climate
Accesibility
Good soil
Good spots for housing
Fossils can only be formed when?
Fossils can only be formed when mud, silt or tar is in the area to preserve the fossil, If erosion does not occur and allows the fossil to form, and Oxygen and microorganisms cannot decay the bones.
Which statement best describes the difference between the sympathetic and parasympathetic nervous system
Answer:
The Statements Are:
A). The sympathetic system sends signals within the brain and the parasympathetic system sends signals between the brain and the body.
B). The sympathetic system controls voluntary body movements and the parasympathetic system controls involuntary functions.
C). The sympathetic system contains the brain and spinal cord and the parasympathetic system contains the peripheral nerves.
D). The sympathetic system prepares the body for stress and activity and the parasympathetic system prepares the body for rest.
Explanation:
Imagine that you are buying books one by one and then piling them up after reading them. Which geologic concept could you use to identify the topmost book as the newest?
A.
principle of inclusion
B.
principle of lateral continuity
C.
law of superposition
D.
principle of unconformities
Answer: Law of superposition.
Explanation: The law of superposition is an axiom that can be used as the basis of geology and archaeology.
This is a form of relative dating which can be used to determine the age of the rock. It states that the oldest layer will be at the bottom of the sequence and the newest layer formed will be at the top of the sequence.
Buying books and piling the books after reading them shows the law of superposition.
Are viruses alive? The scientific debate continues. Viruses exhibit some characteristics of life, but others are missing.
The MOST obvious reason why scientists still refer to viruses as non-living is that they
A) do not change over time.
B) do not contain any genetic material.
C) are much smaller than anything alive.
D) are not composed of one or more cells.
Answer:
D) are not composed of one or more cells
Explanation:
Viruses are considered as non-living things because viruses can be obtained in crystals and do not change over time. It is a non-living property. They remained as it is for a long time but can replicate using energy of the host. Therefore, they are non-living outside a host cell. They are made of nucleic acid and protein. They do not made of cell or cells.
The cooking of eggs on a hot stove is an example of which of the following?
There are no answer choices, so I don't know what you are looking for exactly. But if I took a guess on what topic you are learning about, I would say that the cooking of eggs is a chemical change, due to the fact that the egg is changing composition and you cannot uncook an egg.
Where dose deposition form in the atmosphere
Predator-prey relationships DECREASE
Competition DECREASE
Toxins BOTH
New habitat BOTH
Disasters DECREASE
Increased food source INCREASE
Answer:
thx
Explanation:
When coral animals die, their skeletons fall to the sea floor. true or false
Answer:false]\\
Explanation:
How you identify cytoplasm
In cell biology, the cytoplasm is the material within a living cell, excluding the cell nucleus. It comprises cytosol (the gel-like substance enclosed within the cell membrane) and the organelles – the cell's internal sub-structures. All of the contents of the cells of prokaryotic organisms (such as bacteria, which lack a cell nucleus) are contained within the cytoplasm. Within the cells of eukaryotic organisms the contents of the cell nucleus are separated from the cytoplasm, and are then called the nucleoplasm. The cytoplasm is about 80% water and usually colorless.[1]
hope it helps
How long after crocodile mating are the eggs laid?
Crocodiles normally take 3 or 4 weeks to develop their eggs after mating. After laying the eggs, it'll take them 3 months more or less to hatch.
Hope it helped,
BioTeacher101
around 80 days
The eggs have an incubation period of around 80 days. The rate of development is strongly influenced by temperature. The warmer it is the faster they grow! After two to three weeks the temperature of the nest determines the sex of the embryo
Btw can i have brainliest
what indicates to a muscle that it should contract
40 POINTS! DON'T GUESS! Millions of years ago, the Indian plate began pushing gradually towards the Eurasian plate. The land above started rising in various patterns. Which physical feature most likely resulted from such a motion?
This is probably a mountain. It was caused by the crust moving together. When one tectonic plate moves beneath another at a plate boundary the plate boundary it is called is Convergent boundaries. So mountains form at convergent boundaries.
Folded mountain with waves, twists, and turns
Its actually beautiful there!
The Himalayas is the physical feature resulting from the collision between the Indian and Eurasian tectonic plates. This ongoing process causes the rise of the mountains and frequent seismic activity in the region.
Explanation:The physical feature that most likely resulted from the motion of the Indian plate pushing towards the Eurasian plate millions of years ago is the Himalayas. This massive mountain range was formed by the collision of the two tectonic plates, a process that continues to this day. As the plates collide, the land above is pushed upward, forming the mountain ranges we see. The continued pressure not only results in the elevation increase of the Himalayas by one to five millimeters per year but also makes the region seismically active, leading to frequent earthquakes and tremors.
The creation of the Himalayas and other mountain ranges such as the Tibetan Plateau is a prime example of the dynamic nature of Earth's crust caused by plate tectonics. This geologic activity reflects the constant motion of tectonic plates and the associated heat transfer process that helps cool the Earth's interior.
Learn more about Himalayas here:https://brainly.com/question/30558370
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which of the following factors and which area biotic factors
A. rain and grass are biotic; wind and humidity are abiotic
B. algae and fungi are biotic: temperature and rainfall are abiotic
C. oxygen and sunlight are biotic: maple trees and spiders are abiotic
D. fish and whales are biotic: plankton and bacteria are abiotic
The answer is (B) because abiotic factors , like rainfall and temperature , are non-living things.
Biotic factors are living or once-living organisms in an ecosystem, while abiotic factors are non-living components in an ecosystem. The correct answer to this question is B. algae and fungi are biotic; temperature and rainfall are abiotic.
Explanation:In an ecosystem, there are both biotic factors and abiotic factors. Biotic factors are living or once-living organisms, such as grass, algae, fungi, fish, whales, maple trees, spiders, plankton, and bacteria. Abiotic factors, on the other hand, are non-living components, such as rain, wind, humidity, temperature, oxygen, and sunlight. Therefore, the correct answer is: B. algae and fungi are biotic; temperature and rainfall are abiotic.
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WILL MARK AS BRAINLIEST!!!!!
A hydra is an aquatic organism that lives in fresh water. During reproduction an outgrowth begins to form on the parent. The outgrowth continues to develop into the daughter organism and eventually breaks off of the parent. Which type of reproduction does this represent?
A.
binary fission
B.
regeneration
C.
budding
D.
vegetative propagation
C is the correct answer
The right answer is C
Gemmiparity (or budding) is a type of asexual or vegetative multiplication, in which a bud develops which then separates before evolving into a complete individual. The new organism is a clone that has the same genome. Buds, also called sprouts, may include a rough outline of all the parent's tissue, or only some of them.
What process uses rock layers and index fossils to determine an object estimated age
Answer:
related dating is the answer
Explanation:
Which statement is most likely to be true, based on the drawings below? Two skulls A. Species A had more massive jaw muscles than species B. B. Species A walked more upright than species B. C. Species A was more capable of speech than species B. D. Species A was more similar to modern humans than species B.
The correct answer is: A. Species A had more massive jaw muscles than species.
Massive jaw muscles are correlated to more primitive diet. It is believed that shrinking jaw muscles is part of the evolution. It is the way for making the space for a bigger brain.
Answer:
The correct answer is: A. Species A had more massive jaw muscles than species.
I hopes this helps
Explanation:
Which statement about natural selection is true
please write the statements to get help
Natural selection is the process by which organisms with more beneficial traits are more likely to survive and reproduce.
The correct option is (C).
1. Natural selection is a fundamental mechanism of evolution proposed by Charles Darwin, where individuals with advantageous traits are more likely to survive and reproduce, passing on those traits to their offspring.
2. This process results in the gradual accumulation of beneficial traits within a population over successive generations, leading to the adaptation of organisms to their environments.
3. Natural selection acts on existing variation in traits within a population, favoring traits that enhance an organism's ability to survive and reproduce in its specific environment.
4. Over time, natural selection can lead to changes in the frequency of traits within a population, ultimately driving the process of evolution.
5. While natural selection is a central concept in evolutionary biology, it is not synonymous with evolution itself. Evolution encompasses a broader range of processes, including genetic drift, gene flow, and mutation, which collectively contribute to the diversity of life on Earth.
complete question given below:
Select the correct answer. Which statement about natural selection is true? A. Natural selection and evolution are two terms for the same phenomenon.
B. Natural selection is an outdated theory to explain how evolution took place.
C. Natural selection is the process by which organisms with more beneficial traits are more likely to survive and reproduce.
D. Natural selection is the process by which organisms develop variation in traits, which gives them a better chance of survival.
Which of the following types of passive transport involves the movement of molecules via special transport proteins? A. facilitated diffusion B. simple diffusion C. filtration D. osmosis
Answer:
A
Explanation:
There are different mechanisms for transport of molecules across the cell membrane. One kind of this transport is facilitated diffusion, this is a form of passive transport, not requiring any ATP (the opposite would be active transport, where it does require ATP.
Simple diffusion does require special transport proteins, and neither does osmosis. Filtration is a technique used for sterilisation of water, where any impurities can be drawn out of the liquid
Which of the following limit cell size? Select all of the answers that apply.
A. ratio of surface area to volume
B. rate of moving materials across the cell's membrane
C. efficiency of using the information in a cell's DNA
D. efficiency of DNA replication and cell division
Answer:
The correct answer would be A. ratio of surface area to volume .
The cells are mostly spherical in shape.
The surface area of the sphere = 4πr²
The volume of the sphere = (4πr³)/3
Thus, the increase in size would increase the volume (r³) more as compared to the increase in surface area (r²).
The ratio of surface area to volume would decrease due to which the diffusion rate would not be efficient enough to distribute the essential elements throughout the volume of the cell.
The cell would not be able to survive.
This is the reason that cells have a small size.
The answer options (factors) that are capable of limiting a cell size include the following:
A. ratio of surface area to volume.
B. rate of moving materials across the cell's membrane.
C. efficiency of using the information in a cell's DNA.
A cell can be defined as the fundamental (basic) functional, structural and smallest unit of life, which is mainly found in all living organisms.
Some of the factors that limit the size of a living cell include the following:
The ratio of surface area to volume: this is always required to be small, so as to allow sufficient materials such as food, move through the cell membrane quickly for the cell's survival.The rate of moving materials across the cell's membrane: the survival of a cell is highly dependent on the rate at which necessary materials move across it's cell membrane.The efficiency of using the information in a cell's DNA: a small sized cell has higher efficiency in the use of information that are stored in its deoxyribonucleic acid (DNA).Read more: https://brainly.com/question/19559847
Does studying fossils show us that life, environments, or both of these change over time?
A.
Studying fossils shows us that only life changes over time.
B.
Studying fossils shows us that only environments change over time.
C.
Studying fossils shows us that both life and environments change over time.
Well, I know logically that both life and environment change over time. So I think the answer would be C, studying fossils shows us that both life and environments change over time. Hope this helps.