a mechanism for evolution in nature
Answer:
Natural selection
Explanation:
Have a great day!
Answer:
natural selection
Explanation:
natural selection is one of many mechanisms for evolution in nature. it's one of the most viewed mechanisms for evolution. Natural selection occurs when one allele makes an organism that is more or less fit, that has the ability to survive and reproduce.
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Which process is absent in animal cells?
making proteins
chemical reactions
respiration
photosynthesis
Answer:
photosynthesis
How many chromosomes will be in a fertilized egg if the sperm has a monosomy disjunction error?
Answer:
About half of all girls with Turner syndrome have a monosomy disorder. Monosomy means that a person is missing one chromosome in the pair. Instead of 46 chromosomes, the person has only 45 chromosomes.
Explanation:
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After a nuclear disruption in Siberia during the winter, scientists found evidence that the DNA in cells of local wildlife newboms had several mutations. Which of
the following is a valid claim that can be made about how the nuclear disruption led to mutations?
A High temperatures during the disruption caused damage to parental gametes (sex cells) resulting in mutations in newborns
mutations in newborns
B. High temperatures during the disruption caused damage to parental somatic cells resulting.
C Exposure to radiation during the disruption caused damage to parental gametes (sex cells) resulting in mutations in newborns.
D. Exposure to radiation during the disruption caused damage to parental somatic cells resulting in mutations in newborns.
Answer:
The correct answer is choice (B) the
production of proteins. Choice (A)
is incorrect because mitochondria
produce energy for the cell. Choice (C)
is incorrect because the cell membrane
controls the removal of substances
from a cell. Choice (D) is incorrect
because lysosomes break down
chemicals.
Explanation:
C. Exposure to radiation during the disruption caused damage to parental gametes (sex cells) resulting in mutations in newborns is a valid claim that can be made about how the nuclear disruption led to mutations.
What is damaged by radiation while mutations in DNA?Radiation can cause mutations in DNA by damaging the genetic material, and these mutations can be passed on to offspring through the parent's gametes.
This is because radiation can cause mutations in DNA by breaking the chemical bonds that hold it together or by causing other types of damage that alter the sequence of nucleotides. Since gametes are the cells that are involved in reproduction and pass on genetic material to offspring, mutations in gametes can be passed down to future generations.
Somatic cells, on the other hand, are the cells that make up the body of an organism but are not involved in reproduction. Mutations in somatic cells can lead to health problems for the individual but are not passed down to offspring.
Therefore, in this scenario, exposure to radiation during the nuclear disruption likely caused mutations in the gametes of the local wildlife, which were then passed down to their offspring resulting in genetic mutations in newborns.
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The following are problems with rapid growth *
•overcrowded schools
•polluted rivers and drinking water
•barren land
•all above
Answer:
all above
Explanation:
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What is a polar molecule?
Answer:
a polar molecule is a molecule that has a charge on one side of the molecule, that is not cancelled out.
Explanation:
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Answer: a molecule that has both positive and negative ions
Explanation: a water molecule has an oxygen element and 2 hydrogen elements the oxygen is a negative ion and the hydrogen ions are positive
what is the natural rate of nitrogen fixation in earth’s ecosystems?
Answer:
A reasonable upper bound for the rate of natural nitrogen fixation on land is thus about 140 Tg of N per year.
Find three consecutive odd numbers whose sum is 117. Find two ways to do this.
what are the two primary types of water pollution that have to do with where the pollution came from
Point source and non point source
Physical and liquid
Groundwater and surface water
Chemical and biological
Answer:
Groundwater and surface water .Explanation:
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The body has a number of systems that protect against infection.
Which of the following correctly orders four of these systems from most to least foundational?
Choose 1 answer:
A. B cell lymphatic tissue, lymph node, lymphatic system
B. B cell, lymphatic tissue, lymphatic system, lymph node
C. lymphatic tissue, B cell, lymph node, lymphatic system
Th appropriate ordering of the body system from least to most foundation in which they protect the body against infection is as follows.
cell lymphatic tissue, lymph node, lymphatic system, option A is correct.
The body has levels of organisation that build on each other. Cells make up tissues, tissues make up organs, and organs make up organ systems. The function of an organ system depends on the integrated activity of its organs
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We need to recycle our waste because Earth is a closed system with respect to
matter, and new matter does not enter the environment. Agree or disagree
I disagree because although recycling is good, Earth firstly is not a closed system and new matter enters the environment all the time, such as comets.
In terms of matter, the Earth is often referred to as a closed system. In other words, the total amount of matter on Earth neither changes nor becomes more or less; Instead, it can take on different forms due to different processes. So, I am agree with this statement.
Although the Sun provides the world with continuous energy, most of the actual matter on Earth is recycled and used in various cycles. Recycling of waste is important because it enables us to recover useful materials and resources, reducing the need for mining new raw materials from the earth. Recycling helps us to reduce the environmental damage caused by the extraction and disposal of waste as well as the depletion of natural resources. It helps maintain long-term equilibrium inside a closed system of matter on Earth.
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explain the interaction between geological events, human population, and the environment
The relationship between the environment, human population and geological events is complex and multidimensional. While human activities can also have significant effects on geological processes, geological events such as earthquakes, volcanic eruptions and climate change can have significant effects on the environment and human populations.
What is an Environment?The conditions and forces that surround an organism, population or community are called its environment. It includes all elements of the Earth, both living and non-living, such as the atmosphere, hydrosphere, lithosphere, and biosphere.
The environment is a complex system that living things interact with and influence how they survive, develop and thrive. This includes biological elements such as plants, animals, microorganisms and their interactions, as well as physical elements such as temperature, light, water, soil, wind and topography.
Therefore, the relationship between the environment, human population and geological events is complex and multidimensional.
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Which are two molecular groups that distinguish proteins from carbohydrates?
Proteins are different from carbohydrates due to the presence of
NitrogenCarbonHydrogenOxygenWhich of these structures are used to eliminate wastes in an earthworm?
A. Nephridia
B. Sperm ducts
C. Oviducts
Multiple choice please help!
Answer:
A=T is the answer ..............
Answer:
The correct answer is A) A=T
Explanation:
Megan observes four cells under a microscope and makes sketches of them as shown. Identify whether the cells are prokaryotic or eukaryotic.
How does the water cycle cause weather? Choose any that are correct
Answer:the 1st and 2nd one
Explanation:
I’m probably late but the reason is that they help in the process of forming a cloud that will eventually lead to weather like it being cloudy or rain.
Which of the following describes a process of succession after a forest fire?
A. Small plants and trees grow back at the same time.
B. Two types of plants grow side by side.
C. Small plants grow but are eventually replaced by larger plants.
D. Animals and plants both grow in the area.
SUBMIT
Answer:
D if I'm D correct, or A maybe C, mostly D.
Answer:
C. Small plants grow but are eventually replaced by larger plants
Explanation:
Which of the following best describes an antigen?
B. A recognition molecule on the surface of the cells.
What is antigen?An antigen is a substance that is capable of triggering an immune response in the body. It is typically a foreign substance, such as a pathogen (e.g. a virus or bacterium), a toxin, or a non-infectious particle (e.g. pollen or dust), that is recognized by the immune system as being foreign and potentially harmful.
When an antigen enters the body, it is recognized by immune cells called B cells and T cells, which produce proteins called antibodies to help neutralize and remove the antigen. The antigen-antibody interaction is a key part of the body's immune response and helps to protect us against infectious diseases.
Antigens can also be present on the surface of our own cells, such as cancer cells or transplanted organs, and can trigger an immune response if they are recognized as foreign by the immune system.
Overall, antigens are important components of the body's immune system and play a critical role in protecting us against infectious diseases and other threats.
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The purpose of the light-dependent reactions of photosynthesis is to -
a
split water to form oxygen
b
produce sugars
c
join glucose molecules to form starch
d
uses energy molecules like ATP
Which of the following is an example of an adaption?
A: Wolves work together to catch prey
B: A dog walks without pulling on its leash
C: Ducks swim near the shore by a picnic area, where food is always available
D: Birds living near a highway learn not to fly away every time a car passes
Answer:
D
They are adapting to their environment to increase chances of survival.
Explain the carbon circle in 5 sentences
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Answer:Carbon moves from the atmosphere to plants.
Carbon moves from plants to animals.
Carbon moves from plants and animals to soils.
Carbon moves from living things to the atmosphere.
Carbon moves from fossil fuels to the atmosphere when fuels are burned.
Carbon moves from the atmosphere to the oceans.
Why do cells go through division?
A. Repair
B. Reproduction
C. Growth
D. All of these are correct
Answer:
The answer should be D because all of these are the reasons.
what is all of the dna in a set of 23 chromosomes referred to as?
Answer: The Genome
Explanation:
a change in DNA structure that might be beneficial, harmful, or neutral. What is all of the DNA in a set of 23 chromosomes referred to as? The genome
PLZ HELP BRO its about environmental systems
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The following are true of DDAVP or desmopressin except
D. it helps to stimulate the urinary bladder to produce more urine.
C. it is administered by injection
A. it is a form of vasopressin
B. it is used to take the place of ADH
Answer:
i think its BExplanation:
Although both eukaryotes and prokaryotes are capable of causing infectious diseases in humans, eukaryotes are unique because they have a/an:
Answer:
organized nucleus
Explanation:
why is modification of seed is useful
Explain what is wrong with the cells shown in the image below.
Answer:
wrong answer
Explanation:
it doesn't show any thing that why its wrong
The organelles that break down lipids, carbohydrates, and proteins into
small molecules that can be used by the cell are called *
A. vacuoles
B. lysosomes
C. ribosomes
D. microfilaments