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icang [17]
3 years ago
15

Can natural selection occur? Why/why not?

Biology
1 answer:
Phoenix [80]3 years ago
7 0

Answer:

The reason why it occurs is when the organism doesn't have the desirable traits it needs to survive.

Explanation:

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Pepto Bismol and Milk of Magnesia are products that people can take when they have an upset stomach, usually caused by excess st
Lena [83]

These products are designed to coat the gastric tissues and protect it from the acidity of the stomach or gastric secretions.

<h3>What are Pepto Bismol and Milk of Magnesia?</h3>

Pepto Bismol is made up of mainly Bismuth subsalicylate which has the ability to coat the mucosal surface of the gastric tissues.

Milk of Magnesia contains antacid that helps reduce the acidity of the stomach.

Therefore Pepto Bismol and Milk of Magnesia can be taken when people have an upset stomach.

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2 years ago
How many chambers does the heart contain?<br> a. 3<br> b. 4<br> c. 5<br> d. 6
madam [21]


The best answer is b.  4

The human heart has  four chambers - two atria and two ventricles.

1. Right atrium -  receives oxygen-poor blood from the body and pumps it to the right ventricle.

2. Right ventricle -  pumps oxygen-poor blood to the heart.

3. Left atrium - receive oxygen - rich blood from the  lungs.

4. Left ventricle - pumps oxygen rich blood to the body.

The heart is a muscular organ. It is about the size of a closed fist. It is located in the thoracic cavity. It is protected by the rib cage and is the major organ of the circulatory system.



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3 years ago
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predict what might happen if the respiratory membrane were instead composed of two layers of stratified squamous epithelium
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If the respiratory membrane is composed of two layers of stratified squamous epithelium, it will mostly contain numerous cell layers because it is its composition of having to be a stratified squamous epithelium. Another thing, the tissue will most likely be a shield for this type of epithelium will serve as a protection against abrasion of which the respiratory membrane will be protected of.

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Which best describes the reliability of the source?
iris [78.8K]

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Explanation:

                             

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Assume that a mutation in the dna occurs so that the fourth base (counting from the 5' end) of the messenger rna now reads a rat
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Methionine-methionine leucinelysine that a mutation in the DNA occurs so that the fourth base (counting from the 5' end) of the messenger RNA.

mRNA codons are read from 5' to 3' , and they specify the order of amino acids in a protein from N-terminus (methionine) to C-terminus. The mRNA sequence is: 5'-AUGAUCUCGUAA-5'

Ciodons which is broke the sequence into a series of three-nucleotide units. There are three-letter nature of codons that the four nucleotide found in mRNA such as  A, U, G, and C  all these can produce a total of 64 different combinations. The sequence of the tRNA anti-codon is 3'-UGC-5' and the tRNA will carry the amino acid which is the encoded by the codon.

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