BIOLOGY HIGH SCHOOL

What is a fixed allele?a. an allele that formed by adaptive radiation
b. an allele that is found on many genes
c. an allele that mutates with each generation
d. an allele present in all members of a population?

Answers

Answer 1
Answer:

All humans are homozygous for alleles known as fixed alleles. Of course, many human characteristics are malleable. Height, eye color, and hair color are all variable. Thus, option D is correct.

What are the properties of fixed allele?

An allele in which there are no other alleles for this location in the population, since everyone in the studied population is homozygous for it.

Genetic variety may be hampered by genetic drift, which may cause gene variations to completely disappear. Additionally, it can make previously uncommon alleles common and even fixed.

An allele is said to be fixed if it is the only variant of that gene in the whole population.

All individuals in the population have homozygosity for a fixed allele. Typically, the term “allele” refers to one alternative gene among many that could exist for a specific DNA region.

Therefore, an allele present in all members of a population.

Learn more about fixed allele here:

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Answer 2
Answer: D.

A fixed allele is homozygous within a population so D should be the correct answer.

Hope this helps!

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Which structural characteristic is seen in rna but not in dna

Answers

Single stranded
Uracil

The five-kingdom system of classification reflects the idea that all organisms can be separated into two main groups: prokaryotes and eukaryotes. The new six-kingdom system recognizes three broader groups that include six kingdoms. How do the three basic groups of the six-kingdom system differ from those of the 5-kingdom system? A) The six-kingdom system has three domains in order to includes a new kingdom for viruses. B) The six-kingdom recognizes the vast differences in protists and divides them into two kingdoms. C) The six-kingdom system has three domains: two domains separate all prokaryotic organisms into two new groups. D) The six-kingdom system adds a broader classification of domain to divide all living things into three groups: microorganisms, plants, and animals.

Answers

Answer;

C. The six-kingdom system has three domains: two domains separate all prokaryotic organisms into two new groups.

Explanation;

  • The six-kingdom system has three domains: two domains separate all prokaryotic organisms into two new groups.
  • Organisms are classified into three Domains and into one of six Kingdoms of life. The three-domain system has Archaea, Bacteria, and Eukarya, while the Kingdoms are Archaebacteria, Eubacteria, Protista, Fungi, Plantae, and Animalia.
  • All eukaryotic organisms are in the domain Eukarya. Prokaryotes are divided into two kingdoms and two domains, Archaea and Bacteria.
i believe the answer is c because there are 3 domains: Archaea, Bacteria, and eukraya. 

What is an important characteristic of the plant cell wall?a. It is fluid.
b. It is rigid.
c. It is alive.
d. It stretches.gy

Answers


The best answer is b - it is rigid.

The cell wall is defined as the rigid, outermost layer found in plants and also certain bacteria, algae and fungi. It is absent in animal cells.

The plant cell wall is made up  cellulose which is a structural carbohydrate. The cell wall is rigid and thus offers structural support allowing plant such as trees to grow to great heights.

It also helps prevent water loss, helps protect against insects and pathogens and keeps the shape of the plant.

the answer to this question is B because im doing a bilogy test right now as u read this :)

Describe the tetracycline group of antibiotics. How do these drugs work? What is their target on a bacterial cell? Which types of bacteria are they effective against?

Answers

Tetracyclines are antibiotics used against a wide range of microorganisms, such as bacteria, chlamydia, rickettsia and some protozoa parasites.
They inhibit synthesis of protein in bacteria by inhibiting the binding of transport RNA and ribosome and are effective against both gram-positive and gram-negative bacteria.

What is produced from the third stage of cellular respiration, the electron transport chain? A. NADH and water B. Water and ATP C. Pyruvate and ATP D. Carbon dioxide and NADH

Answers

The answer is B. Water and ATP.

The main function of electron transport chain (ETC) is a production of ATP. It takes electrons freed in the previous stages of cellular respiration. It is actually a series of oxidation-reduction reactions in which the oxygen is the final acceptor of electrons. As the result, water and ATP are produced.

Answer:

B- water and ATP

Explanation:

I took the test and it was correct

Nitrogen is important to life because it is part of _____. DNA, amino acids, and proteins plant photosynthesis the air we breathe lightning storms

Answers

Nitrogen is important to life because it is part of AMINO ACIDS and PROTEINS.

The answer is A, DNA, amino acids, and proteins
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