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anygoal [31]
3 years ago
13

During which phase of the moon is the moon not visible?

Biology
2 answers:
Umnica [9.8K]3 years ago
7 0
The phase when the moon is not visible is in the last quarter phase
Dafna1 [17]3 years ago
3 0

It is the New Moon!


It is only visable during a solar eclipse any other day it is just dark!

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What is Crossing over
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Answer:

Crossing over is the swapping of genetic material that occurs in the germ line. During the formation of egg and sperm cells, also known as meiosis, paired chromosomes from each parent align so that similar DNA sequences from the paired chromosomes cross over one another.

Explanation:

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3 years ago
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Roy throws a ball up in the air. Each time he throws the ball up in any direction, it falls back to the ground as shown in the
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It some back to earth since gravity pulls it down
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Acetylcholine receptors on skeletal muscles are described as being ionotropic receptors because
DerKrebs [107]

Answer:

they are Na+, K+ and Ca2+ ion channels.

Explanation:

Ionotropic acetylcholine receptors are also called nicotinic acetylcholine receptors because beside acetylcholine (Ch) they respond to nicotine. These receptors are  primary receptors in muscle for motor nerve-muscle communication that controls muscle contraction.

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3 years ago
In the 1950s, when Watson and Crick were working on their model of DNA, which concepts were well accepted by the scientific comm
bogdanovich [222]

Answer:

The correct answer will be-

1. Chromosomes are made up of protein and nucleic acid.

2. Genes are located on chromosomes.

3. Chromosomes are found in the nucleus.

Explanation:

Watson and Crick are known for their findings on the structure of DNA in 1953. Their findings were motivated by the book called "What is Life?".

The book stated the concepts which were well accepted by the scientific communities that is the gene determines the trait which is located on the chromosomes proved by the experiments of Morgan.  

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But the genes are made up of DNA was not well accepted which was suggested by the experiments of Avery in 1940s.

Thus, the selected options are the correct answer.

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The majority of the protein inside a red blood cell (erythrocyte) is:
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3 years ago
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