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melamori03 [73]
3 years ago
10

Which of these is true for a fetus by the end of the first trimester of fetal

Biology
1 answer:
Jet001 [13]3 years ago
6 0

Answer:

the answer is A :)!!!!!!!!!

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30. One cause of muscle soreness is
xenn [34]

Answer:

c. lactic acid fermentation

Explanation:

If we did alcoholic fermentation, working out would make us feel drunk, not sore. This is only done by yeasts (a type of fungus) and bacteria. Glycolysis is simply an anaerobic process that occurs with fermentation and also regular aerobic respiration. It doesn't cause any soreness on its own. The Krebs cycle is the second major part to cellular respiration; it produces 6 NADH's, 2 FADH2's, 4 CO2's and 2 ATP; it's not involved in creating any soreness, as cell respiration does not create soreness. That leaves lactic acid fermentation, which we, bacteria, yeasts, and other organisms do. This is what we do when we run out of ample oxygen while doing some strenuous activity. Glycolysis is done with it. Glycolysis, however, relies on NAD+ to create ATP we need to maintain the same level of activity, lactic acid is produced as it accepts the 2 electrons and [H+] NAD+  should accept.

4 0
3 years ago
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Some snail species' shells can have right-handed direction of shell coiling or left-handed direction of shell coiling. The direc
makkiz [27]

The cross between Dd egg-snail and a dd s snail mate will result in snails with genotype 1/2 Dd:1/2 dd and phenotype all right-coiling.

<h3>What is a genotype?</h3>

The genotype refers to the allele combinations that can be found for one or more loci in an individual.

The phenotype refers to how the genes and alleles interact to produce a physical trait in an organism.

In this case, one parent can produce two types of gametes (D and d), whereas the other parent can only produce d gametes.

Learn more about genotypes here:

brainly.com/question/22117

4 0
2 years ago
The bulldog ant has a diploid number of two chromosomes. Therefore, following meiosis, each daughter cell will have a single chr
Goryan [66]

The bulldog ant has a diploid number of two chromosomes. Therefore, following meiosis, each daughter cell will have a single chromosome. In addition to mutations, genetic diversity might be generated in this species due to (C) crossing over and random fertilization.

There are some points during sexual reproduction which might increase the chances of a genetic diversity.

During meiosis I, crossing over during prophase produces sets of chromosomes having new combinations of alleles.

Genetic diversity might also generated by random fertilization of the gametes created through meiosis. Any of the genetically distinctive sperm produced by a male might fertilize the genetically distinctive egg produced by a female.

To learn more about crossing over here

brainly.com/question/19671756

#SPJ4

6 0
2 years ago
Can we cry underwater?
vlabodo [156]
<span>No crying underwater is not possible because of 2 reasons. 
1) While crying there is a spasm of muscles , of that of the oesophagus (throat) and this would result in death of an individual if he/she is under water. 
2) The external fluid pressure will not permit the tear gland to secrete tears there by nullifying the possibility. 
Thus u cannot cry unre water.. 
of course except if u are wearing a goggle or u are in a submarine! :)</span><span>

</span>
6 0
3 years ago
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A scientist who studies earthquakes is a
lys-0071 [83]
A scientist who studies earthquakes is considered a seismologist. 
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