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Nadusha1986 [10]
2 years ago
10

Comet tails _____.

Biology
2 answers:
natali 33 [55]2 years ago
5 0

Answer:

always point toward the sun

Explanation:

olga55 [171]2 years ago
3 0

Answer:

are only seen when comets are near the sun

Explanation:

The characteristic "tail" of a comet is only visible when it is close to the sun. The center of a comet is a solid mass, called the nucleus, made of ice, frozen gas, rock, and dust.

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What was the main result of the Persian Wars?
Zielflug [23.3K]

Answer:

The result was that Athens won the Persian wars and that they stopped Persia from conquering Europe. ... It preserved the Greek's independence and made sure that Persia did not conquer all of Europe. What were the Greeks able to use to win the Battle of Salamis? The Greeks used fast ships to ram into the Persian ships.

Explanation:

6 0
3 years ago
The blood sugar in your body is maintained by a gland that acts as an exocrine and endocrine gland. It is the
Irina-Kira [14]

Answer:

Pancreas.

Explanation:

Pancreas is an organ that acts as both exocrine as well as endocrine gland. As exocrine gland, it secretes digestive enzymes into the small intestine that help in digestion of complex food molecules.

As an endocrine gland, it secretes glucagon (from alpha cells) and insulin (from beta cells) hormones, directly into the bloodstream. Both of these hormones are responsible for the regulation of blood sugar level in the body.

Thus, the correct answer is 'pancreas.'

8 0
2 years ago
What happens to RNA polymerase II after it has completed transcription of a gene? a. It begins transcribing the next gene on the
Over [174]

The correct answer is: b. It is free to bind to another promoter and begin transcription

Transcription is the first step of gene expression in which DNA molecule is copied (transcribed) into RNA (mRNA) by RNA polymerase. The process of transcription is divided into three phases:

1. Initiation

• RNA polymerase with transcriptional factors bind to gene promoter  

• RNA polymerase unwinds DNA double helix (transcription bubble is formed)

2. Elongation

• RNA polymerases adds nucleotides complementary to DNA  

3. Termination

• RNA polymerase gets to stop codon (transcribes a sequence of DNA known as a terminator)

• Formed complementary RNA strand is released from DNA-RNA complex.

RNA polymerase is also released and can transcribe some other gene by binding to its promotor. RNA polymerase will transcribe just the genes whose products are needed at a particular moment.

7 0
2 years ago
The primary difference between what qualifies as serial murders and what qualifies as mass murders is the selection of victims.
maxonik [38]
I believe the appropriate answer is a cooling-off period. The cooling off period us described as the state of returning to the offender's usual way of life between homicides. The key distinction between the serial killers and mass or spree killers is this emotional cooling off period in which the killer blends back into his/her normal life.
7 0
3 years ago
What type of food is eaten in each zone of a lake
9966 [12]
The answer to your question is fish
6 0
2 years ago
Read 2 more answers
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