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Olegator [25]
1 year ago
9

The embryonic period is the second period of prenatal development and extends from the third week through the eighth week. Selec

t one: True False
Biology
1 answer:
Anton [14]1 year ago
3 0

True. The embryonic period is the second period of prenatal development and extends from the third week through the eighth week.

<h3>What is embryonic period?</h3>

Your kid goes through a phase of rapid change after conception known as the embryonic stage. From the fifth through the tenth week of pregnancy, this phase lasts. The infant is referred to as an embryo at this point. The embryonic stage is when a lot of changes take place.

<h3>What happens during embryonic stage?</h3>

The heart starts to beat and the organs develop and start to work during the embryonic period.

<h3>Why is embryonic stage important?</h3>

The brain develops during the embryonic period, which is crucial.

Learn more about embryonic here:

brainly.com/question/15875287

#SPJ4

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Despite the aggressive defense of the cardiovascular system by the immune system, some microbes can invade and establish an infe
Anton [14]

Answer:

The mismatch is on the statement that says "Bacillus anthracis produces antioxidants to combat lysosomes."

Explanation:

A. Bacillus anthracis produces antioxidants to combat lysosomes.

This is incorrect. Bacillus anthracis is a bacterium that forms aerobic spores, whose structures contain the genetic material of the bacteria and that resist long periods without water or nutrients, in conditions of extreme heat or cold. Bacillus anthracis is found in some forms, one of this, is the cutaneous anthrax. Cutaneous anthrax is a skin infection caused by direct contact with the bacterium.

B. Coxiella burnetii produces an endospore-like structure.

Coxiella burnetti is a bacterial zoonosis and produces structures similar to endospores, which are cells or forms of resistance that develop certain bacilli against heat, desiccation, radiation and chemical influences.

C. Trypanosoma cruzi cloaks itself in host proteins to avoid immune recognition.

Trypanosoma cruzi is characterized by being a parasite with great antigenic variability. In the host infected with Trypanosoma cruzi, the membrane protein called cruzipain, is a response used in favor of the parasite. The humoral response to the cruzipain antigen, the largest antigen of Trypanosoma cruzi, is implicated in the pathogenesis of experimental Chagas disease.

D. Borrelia burgdorferi changes its surface antigens to avoid immune recognition

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5 0
3 years ago
Why is it important to ensure that a downed game animal has expired before approaching it?
andriy [413]
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A scientist begins a PCR with 10 picograms of DNA and allows it to go through three cycles.
BaLLatris [955]

Answer:

b. 80g

Explanation:

Three cycles of PCR would produce 3 doublings of the amount of DNA.

Cycle 1: 10x2  = 20pg

Cycle 2: 20x2 = 40pg

Cycle 3: 40x2 = 80pg

This can also be worked out for large cycle numbers by final mass = starting mass x 2ⁿ, where n is the number of cycles.

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3 years ago
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In the process of transcription, an enzyme called RNA polymerase recognizes and binds to a DNA nucleotide sequence just before the beginning of the gene. This recognition site, called a promoter, positions RNA polymerase properly on the correct DNA strand and points it in the right direction.

The DNA strands then separate over a short distance and the polymerase moves into the gene and as it moves, it creates a new chain by linking together individual ribonucleotides existing free in the cell, This new chain or strand is called messenger RNA.

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3 years ago
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