10. Systematists categorize all living creatures into what three domains?

1 answer:

5 0

The correct answer for this question would be option B. Systematists categorize all living creatures into three domains namely bacteria, archaea and eukarya. This is according to the Woese system which is introduced in 1990. Both Archaea and Bacteria are classified as prokaryotes or single-celled organisms. Hope this answer helps.

You might be interested in

Long before the structure of DNA was solved, the physicist Erwin Schrodinger suggested that the three-dimensional arrangement in

Georgia [21]

Watson and Crick's model explained mutability because bases pairs can suffer changes (mutations) during DNA replication. Moreover, this model also explained stability because DNA strands are held together by hydrogen bonds.

Deoxyribonucleic acid (DNA) is a double helix molecule composed of two long chains of four types of nucleotides, each containing one different nitrogenous base, i.e., Adenine, Guanine, Cytosine and Thymine.

In Watson and Crick's model, both DNA strands are held together by hydrogen bonds between nitrogenous bases on opposite DNA strands, thereby providing stability to the DNA molecule.

In DNA, Guanine always pairs with Cytosine by three hydrogen bonds, while Adenine always pairs with Thymine by two hydrogen bonds.

Moreover, Watson and Crick suggested that mutations could occur as a consequence of a base occurring very infrequently in one of the less likely tautomeric forms during DNA replication, thereby also explaining the mutability of life.

Learn more in:

brainly.com/question/762661

3 0

2 years ago

BRAINLIESTTT ASAP!! PLEASE HELP ME :) Relate temperature and molecular motion.

Sergio039 [100]

they both produce heat

8 0

4 years ago

Read 2 more answers

At which point does the motion of convention currents occur to drive plate movement

OLEGan [10]

Answer: 2

The convection currents shown in points 1 and 3 transfer heat from the outer core (number 4) to the lithosphere. Here, the lower density hot magma breaks apart the plates at point 2 creating a divergent plate boundary. This new magma mass will drive a lateral movement of the plates. The edges of the plates which have a higher density basalt rock will sink into the mantle and get consumed in trenches/subduction zones

7 0

3 years ago

What is the evolutionary advantage of an exoskeleton?

Scorpion4ik [409]

Answer: E. A B, and C only

Explanation:

An exoskeleton is a hard, rigid, protective external structure that supports and protects the body of the animal from the damage caused either by injury or by predator. It supports and protects the inner organs and structures, acts as a barrier against desiccation. These act as a point of attachment of the muscles which provides a structural framework to the body. The exoskeleton is waterproof hence, protects the organism from being affected by the external water. It can be seen in the form of shells or scales, nails, hooves and other structures.

7 0

3 years ago

This Pedigree represents a family with an Autosomal Recessive Disorder. What is the probability that IV4 and IV5 have a child wi

Oksi-84 [34.3K]

As this family has an Autosomal Recessive Disorder, we must know that this disorder will only be expressed, in the family members who are homozygous recessive (aa), in this way, to know the probability of IV-4 and IV-5 to present the disorder, we must evaluate the probabilities of combinations of their parents' alleles in a diagram called a punnett square.

In the pedigree above, we can see that the dark colored balls and squares represent the members of the family who have the disorder and therefore have the "aa" genotype.

Thus, when observing the crossings throughout the family, we know that the father of IV-4, has the genotype "Aa", however we do not know which genotype of the mother of IV-4, but as she does not have the disorder, she may have the genotype "Aa", or "AA", for that reason, we must make the punnett square for both situations and see what the probabilities of IV-4 will present the disorder.

As you can see in the figure attached below, if IV-4's mother has the "Aa" genotype, IV-4 will have a 25% chance of presenting the disorder. If IV-4's mother has the "AA" genotype, IV-4 has a 0% chance of inheriting the disorder.

In the case of IV-5, we can see that his mother has the disorder and therefore has the genotype "aa", we know that his father does not have the disorder, but we do not know if the father's genotype is "AA" or "Aa "and therefore we must evaluate both situations.

As you can see in the figure below called "IV-5", if IV-5's father has the "AA" genotype, IV-5 will have a 0% chance of inheriting the disorder. However, if IV-5's father has the "aa" genotype, IV-5 will have a 50% chance of inheriting the disorder.

8 0

4 years ago