Most land mammals have the ability to rest one hemisphere of their brains at a time.a. True
b. False

Answers

Answer 1

Answer: The answer is b. False.

The ability to rest one hemisphere of their brains at a time is a phenomenon called unihemispheric sleep. It is not common for the most land mammals. It was observed in some reptiles, birds (for example domestic, chicken), and aquatic mammals (dolphins, seals,...). This phenomenon enabled sleeping animals to receive stimuli all the time. For example, in the case of emergency, animal will receive stimuli to fly away. For aquatic mammals, it is important to emerge to the water surface to breathe while sleeping.

Answer 2

Answer:

Answer:

Explanation:

E2020

Related Questions

Which of the following is not found in poultry?A. campylobacter jejuni B. listeria monocytogenes C. salmonella D. staphylococcus aureus
Fungi reproduce by releasing A. sperm. B. seeds. C. spores. D. zygotes.
Science can answer which of the following questions? Is there an afterlife? How large is the Milky Way? Does butter tastes better than margarine? Who will win the next Nobel peace prize in science?
What are the "chemical messengers" that coordinate and direct specific activities of the body?
Parkinson’s disease is a brain disorder that may be caused by mutations in several genes that code for the production of alpha-synuclein. Individuals who have Parkinson’s disease exhibit symptoms such as uncontrollable tremors, difficulty walking, and loss of coordination. How might geneticists determine where the mutations that cause Parkinson’s disease are located?A. PCR analysis B. gene mapping C. DNA fingerprinting D. STR analysis

Describe how Mendel showed that the green-seed trait did not disappear but was only masked.

Answers

Mendel had determined that the allele for green seeds had not vanished because after the second generation of yellow seeds, green seeds started appearing again. He logically concluded that the yellow allele was a dominant trait and the green allele was a nondominant trait.

during photosynthesis in Plants what is the source of carbon in the sugar molecule ( sorry know answer didn't know it was recording lol)

Answers

The source of carbon is either the atmosphere around the plant (i. e air that contains CO2) or they use their own carbon dioxide which they produce in respiration. Hope this helps :).

chlorophyll is the source of carbon in the sugar molecule

Scientific evidence documents the pattern of evolution. The evidence exists in a variety of categories, including direct observation of evolutionary change, the fossil record, homology, and biogeography. Sort the following examples into the correct categories.

Answers

Answer:

Direct observation of evolutionary change: creation of drug-resistant bacteria.

Fossil record: discovery of transitional forms of animals, discovery of shells of extinct organisms

Homology: similarities in mammalian forelimbs, identical genetic code in fireflies and tobacco plants, vestigial pelvis in right whales

Biogeography: resemblance of endangered island species to neighboring mainland species,

Direct Observation of Evolution:

Example: The development of antibiotic resistance in bacteria.

How can direct observation of evolution be observed?

Direct observation of evolution involves studying the changes in a population over a relatively short period of time. One example of direct observation is the development of antibiotic resistance in bacteria.

Scientists have observed that certain strains of bacteria can evolve resistance to antibiotics through genetic mutations and natural selection. By exposing bacteria to antibiotics in laboratory experiments, researchers can directly observe the process of evolution as the bacteria adapt and survive in the presence of the drugs.

Answers

B. A dog walks to a stream and drinks when it gets thirsty
Why? A structural adaptation shows a being physically evolving in order to increase said being's chances of survival. B is not an example of this, since there is no mention of the dog's body changing in order to increase the dog's chances of survival.

(B) A dog walks to a stream and drinks when it gets thirsty.

How might a change of one amino acid at a site, distant from the active site of an enzyme, alter the substrate specificity of an enzyme?

Answers

Answer:

An enzyme is a protein. Any change in the primary structure of a protein (the primary structure is the aminoacid sequence) can induce a change in the secondary, as well as tertiary structure (tridimensional conformation). This change in the shape of the enzyme can affect its activity, since it can change the active site consequently to this conformational change.

Explanation:

DNA polymerase fails to recognize that an incorrect nucleotide has been incorporated, resulting in a mismatch. Which repair pathway will correct this mistake?A. Base excision repair
B. Mismatch repair
C. Direct repair by methyltransferases
D. Nucleotide excision repair

Answers

Answer:

The correct answer is B. Mismatch repair

Explanation:

Mismatch repair pathway recognizes the mismatched base pair that incorporated during DNA replication and then excise that incorrect base. After excision, it repairs the DNA.

The mismatched daughter strand is distinguished from the parent strand by mismatch repair system as the parent strand is methylated at some bases but the daughter strand is not methylated.

Three proteins help in mismatch repair MutH, MutL, MutS. Mut H and Mut S recognize the mismatch, Mut H excise the unmethylated strand from 5' side. Then helicase and exonuclease enzymes clave the segment from cleavage site to beyond the mismatch base.

The gap created by this action is filled by DNA polymerase and sealed by enzyme DNA ligase.

Final answer:

The 'Mismatch repair' pathway corrects mistakes when an incorrect nucleotide has been incorporated into a DNA sequence and DNA polymerase fails to recognize it. This pathway involves several proteins that recognize the error, excise the incorrect sequence, and re-synthesize the correct sequence.

Explanation:

When DNA polymerase fails to recognize that an incorrect nucleotide has been incorporated, resulting in a mismatch, the Mismatch repair pathway is in charge to correct this mistake. This system detects and repairs erroneous insertion, deletion, and mis-incorporation of bases that can arise during DNA replication and recombination, as well as repairing some forms of DNA damage. This process involves several proteins including MutS, MutL, and MutH. They recognize the error, excise the incorrect sequence and then re-synthesize the correct sequence using the original undamaged DNA strand as a template. The 'Mismatch repair' is a crucial mechanism to maintain the integrity of genetic information.