Answer: B. Natural selection occurs when a favorable phenotype allows for differential reproductive success in a population of organisms.
Explanation: Good luck! :D
PLEASE HELP!!!!!! 50 POINTS
Answer in paragraph form about mollusks.
1. Explain how biological evolution is supported by the fossil record.
2. Why is natural selection a mechanism for biological change?
3. How does chemical evolution explain the origin of life on Earth?
4. Explain why scientific theories, such as biological and chemical evolution, represent the strongest explanation of the changes observed in the fossil record.
5. How can scientific theories on evolution and the fossil record change over time?
Answer:
Molluscs have more varied forms than any other animal phylum. They include snails, slugs and other gastropods; clams and other bivalves; squids and other cephalopods; and other lesser-known but similarly distinctive subgroups. Although it is impossible to know the subjective experience of another animal with certainty, the balance of the evidence suggests that most invertebrates do not feel pain. The evidence is most robust for insects, and, for these animals, the consensus is that they do not feel pain. In general, mollusks have 3 body regions: a head, a visceral mass, and a "foot." The head contains the sense organs and "brain," while the visceral mass contains the internal organs. Mollusks usually have a shell (although some do not). Mollusks also have an extension of the body wall called the mantle.
Explanation:
A lone wolf travels hundreds of miles from his original pack and joins a new pack in a different range, affecting the gene pool through which mechanism?
A. genetic drift
B. recombination of alleles
C. gene flow
D. no effect
Answer:
a. genetic drift
A lone wolf travels hundreds of miles from his original pack and joins a new pack in a different range, affecting the gene pool through genetic drift. The correct option is A.
What is genetic drift?
Genetic variety and genetic drift are two of the factors of evolution that are both random processes. Allelic drift, also known as genetic drift, is the change in allele frequency that is most frequently observed in small populations.
Due to random sampling, some alleles in a small population may be lost because of the low allele frequency in a small population. As a result, the population's genetic diversity declines.
Gene flow is the transfer of genes or alleles from a population that resides in one location to a population that resides in another. The movement of various alleles into a new population, it raises genetic variation.
Therefore, the correct option is A. genetic drift.
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(GIVING BRAINLIEST!!)
What is an amendment?
A) A change to something
B) Something that forms the central core
C) What people do as part of a democratic society
D) A document outlining the structure of government
Answer:D
Explanation:an official document of the government
DNA is replicated in the nucleus of eukaryotes, but in the cytoplasm of prokaryotes. Why is this?
Answer:
because they do not ave a nucleus
Explanation:
hope this helps!!
how can genetically modified bacteria with human genes be used to treat human diseases
In the 1980s, scientists discovered how to produce human insulin by transplanting the genetic information for the human insulin hormone from a human cell, into the DNA of the E. coli bacterium. This reprograms the bacteria to produce insulin, in just the same way as they make their own proteins.
In your own words (do not copy and paste from above, or anywhere else), describe the
difference between a gene and an allele?
Answer:
In a more simpler term, the allele is just an variant form of a gene but in a more detailed explanation: each gene stays in a specific place on a chromosome in two copies. One copy inherited from each parent, but the copies or not really the same.
Explanation:
I majored in Biology
If you were the first person to discover cells, what would you have named them? Give a reason why.
Answer
celleys
Explanation:
i just think it wouldve been creative
Which organelles in plant cells absorb sunlight for energy?
O A. Mitochondria
O B. Vesicles
O C. Chloroplasts
O D. Vacuoles
ASAP HELPPPPP!!!
Answer:
the answer is c
Explanation:
1. The diagram below shows the Earth and Sun. What is the most likely time for the location marked with a red dot? (Reminder: Earth rotates in a counterclockwise direction.) * 04:00 AM 10:00 AM 4:00 PM 10:00 PM
Answer:
it would be the 4:00 AM choice
A nucleoside has two parts: a pentagonal sugar (deoxyribose) and a nitrogenous base (in color). When a nucleoside is joined to a phosphate, it is called a nucleotide.
How many different nitrogenous bases do you see?
Answer:A nucleoside has two parts: a pentagonal sugar (deoxyribose) and a nitrogenous base (in color). When a nucleoside is joined to a phosphate, it is called a nucleotide . Note: The names of these nitrogenous bases are adenine (red), cytosine (yellow), guanine (blue), and thymine (green).
Explanation:
Answer:
Just to add the pairs go like
Explanation:
Adenine always pairs with Thymine and Cytosine pairs with guanine
In the diagram of the human urinary system below, which letter indicates a structure responsible for filtering urea and other cellular wastes out of the bloodstream?
A-Kidney
B-Ureter
C-Bladder
D- Urethra
is a group of red squirrels in one area called a population
Answer:
yes
Explanation:
Answer:
yes
Explanation:
A group of any species in one area is called a population
Organism: one animal or plant
Population: a group of a species in an area
Community: All living organisms in an area
Ecosystem: All living and nonliving things in an area
What is an example of capital resource?
O workers
O oil
O machines
O forests
Explanation:
machines ..................................
A physical characteristic of an organism.
Trait
Chromosome
DNA
Heredity
Centromere
how does spirogyra survive in a dry pond?
Answer:
I had a long answer that I would have loved to share but I can't because brainly does not like the words using and there is no way around it, tried using every synonym on the internet... LOL sorry
Spirogyra tends to grow in water in the spring, but when there is enough sunlight and warmth, it produces large quantities of oxygen, which adheres as bubbles between the tangled filaments. The filamentous masses reach the surface and appear as slimy green mats.
What are spirogyra?Spirogyra is free-floating green algae discovered in freshwater environments worldwide.
Spirogyras are filamentous algae with thin linear polymer chains of cylindrical cells that are named after their beautiful spiral chloroplasts.
Spirogyra is prized for human consumption in so many Asian countries and is recognized as an essential component of natural bioactive compounds used for antibiotic, antiviral, antioxidant, anti-inflammatory, and many more purposes.
In the spring, Spirogyra grows in water, but if it has enough sunlight and coziness, it produces large amounts of oxygen, which abides as bubbles seen between tangled filaments.
When the filamentous masses reach the surface, they form slimy green mats.
In a dry pond, using cell wall, it can survive and can get revive as the rain renew the pond.
Thus, this way spirogyra survive in a dry pond.
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all you need is in the photo
ASAP
Answer:
transcription: DNA -> mRNA
Explanation:
transcription is when the DNA is unzipped and then copied onto the mRNA.
hope this helps!
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and have a great day!
1
Which of the following can be used to produce electrical energy?
OA. generators
B.
solar cells
C.
batteries
D.
all of these
Please help me with this question
Answer:
Answer: Not too sure... Maybe The Sun?
Which describes a Mendelian trait?
Answer:
The Mendelian trait are those controlled at only single gene locus. The Mendelian trait have two alleles (one form each parent), out of which one allele is dominant while the other is recessive. ... An example of the human Mendelian trait is the attached or detached earlobes.
The Mendelian trait are those controlled at only single gene locus. The Mendelian trait have two alleles (one form each parent), out of which one allele is dominant while the other is recessive. ... An example of the human Mendelian trait is the attached or detached earlobes.
where do organisms live in the ocean
Answer:
either close to the shore or deeper out into the sea
Explanation:
hope that helps!
Answer: Coastal habitats on the continental shelf, even if this area occupies only 7% of the total ocean area. Most of the open ocean habitats are found in the deep ocean beyond the edge of the continental shelf. Ocean and coastal habitats can be created by species living in them.
Explanation:
Describe how you would test a sample of food to show it contains protein. Give the reason for any safety precautions you would take.
Answer:
Add biuret solution to test for protein
Explanation:
Add biuret solution to the test tube with the solution in it and shake gently. If turns around pink or purple, protein is contained.
Safety precautions would be to be careful with the biuret solution as it is harmful to skin and bad to inhale.
18) Which of these activities is NOT related to the digestive system?
Absorbing nutrients into the bloodstream from the small intestine
Breaking down food particles into smaller particles
Moving solid waste through the body to get rid of it
Delivering nutrients to the cells via the bloodstream
Delivering nutrients to the cells through the bloodstream is not associated with the digestive system.
How are nutrients delivered to the cells?In the process of digestion, the nutrients are absorbed into the bloodstream from the small intestine. The food particles are broken down into smaller components, and the solid waste is excreted from the body. However, the digestive system has no role in delivering nutrients to the cells.
In the body, all the cells require to have nutrients and oxygen, and they require their wastes to get discarded. All these functions are performed by the circulatory system of the body.
The blood vessels and the heart function in combination to provide the cells with the nutrients. With the assistance of the network of blood vessels, the blood collects nutrients from the food from the small intestine and delivers them to each of the cells present in the body.
Thus, the nutrients are not delivered to the cells by the digestive system, it is done by the circulatory system.
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Can someone please help me
1. Lungs
Heart
Veins
Arteries
Stomach
Large intestine
Trachea
Small intestine
Muscles
Bones
A.
Respiratory System
B.
Skeletal System
C.
Muscular System
D.
Digestive System
E.
Circulatory System
2.
In order for cellular respiration to effectively provide the energy your body needs to do its job, which of the following organ systems are needed?
(You may choose more than one answer.)
-Digestive system
-Respiratory system
-None of these systems support cellular respiration.
-Circulatory system
3.
The respiratory system supports the skeletal muscular system by:
-he respiratory system does not support the skeletal muscular system.
-transporting oxygen needed to release energy from glucose to the body's cells.
-breaking down the glucose to release energy.
-digesting the glucose you eat.
Answer:
1A - Respiratory = trachea, lungs... however both arteries and veins move oxygen around the body, and are therefore valid answers
1B - Skeletal = bones
1C - Muscular = muscles
1D - Digestive = stomach, large/small intestine
1E - Circulatory = heart, veins and arteries
2. Cellular respiration is the conversion of sugar into energy the cell uses to function via various chemical reactions. Digestion is an example of this. Stomach acid breaks down food into sugars that cells break down further into energy to keep you alive
3. Bones contain bone marrow deep inside of them which is responsible for the creation of red blood cells. Your lungs can move air all they want but would be useless without red blood cells to take the oxygen to cells and take the CO2 away from them.
Which of the following is NOT a nitrogen base found in RNA?
A.thymine
B.cytosine
C.uracil
D.adenine
Answer:
A.thymine
Explanation:
Thymine is found in DNA
What is the purpose of mitotic cell division in multicellular organisms (give all 3 purposes)? Compare this to the purpose of mitotic cell division in single celled eukaryotes. Use vocabulary words.
Answer:
The correct answer is - The growth and tissue repair are the major purpose of mitotic cells in multicellular organisms.
Explanation:
The purpose of mitotic cell division in multicellular organisms can be understood by the three points:
1. somatic cells divide through mitotic cell division.
2. Every multicellular organism shows growth and develop with time in size
3. Every cell of the body is repaired with the help of the mitosis that replaces the damaged cell with the new cell.
Single-celled eukaryotes show asexual reproduction by binary fission which is a form of mitosis.
which of the following European countries has a marine west coast climate
Answer:
Specifically, marine west coast climates exist in Europe from northern Spain to southern Norway, including the British Isles, the west coast of North American from California to Alaska, and the southern coast of Chile in South America.
Explanation:
Answer: Specifically, marine west coast climates exist in Europe from northern Spain to southern Norway, including the British Isles, the west coast of North American from California to Alaska, and the southern coast of Chile in South America.
Explanation:
Hope it's helpful!
Brainliest!!Which of the following sequences is the correct complementary DNA strand for ATGCTA?
Answer:
TACGAT
Explanation:
Guanine matches with cytosine
adenine matches with thymine
Sugars provide the primary food source for plants. the leaves of a plant make sugar during the process of photosynthesis. Sugars are transported from the leaves of a plant to the roots through the
Answer:
phloem
Explanation:
Put into order the Levels of Organization from U2 M2 L1
1. Cells
2. Organisms (humans/plants)
3. Tissues
4. Organ System
5. Organs
Answer:
Answer below !
Explanation:
1. Cell's
2. Tissue's
3. Organ's
4. Organ system
5 . Organism's
Gene regulation means
A. The genes in some cells are different than the genes in other cells.
B. only some specialized cells can become other specialized cells.
C. genes can be turned on and off.
D. all the genes must be turned on.
Answer:
C genes can be turned on and off
Explanation:
Gene regulation is the ability to induce or repress the expression of a gene