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3 years ago

What is a stellar day

Biology

2 answers:

Varvara68 [4.7K]3 years ago

7 0

Answer: The time in which Earth rotates exactly 360 degrees around its axis, measured relative to the stars.

Explanation: The earth rotates fully during this period of time. The earth doesn't always stay still, it constantly rotates, but it never rotates that much except for this time.

Leona [35]3 years ago

4 0

Answer:

rotational period of Earth

Explanation:

the time in which Earth rotates exactly 360 degrees around its axis, measured relative to the stars

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Physical differences between the cranium of the gorilla, Australopithecus, and modern human. What does this difference tell you

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The gorilla and Australopithecus have a more defined pushed out face feature unlike the modern human who evolved to have a more rounded face. The cranium for the gorilla and Australopithecus happen to be more sunken in unlike the rounded human face. This tells us that the Australopithecus most likely evolved from the gorilla. This also tells us that they lived in different environments because of their different evolutions.

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How do the respiratory and circulatory systems work together to make gas exchange possible?

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Oxygen-poor blood enters the heart through the right atrium. From there blood flows through the tricuspid valve into the right ventricle. When the heart contracts during the diastolic phase, this blood is pumped out through the pulmonary arteries that run toward the lungs. At the lungs, the blood is circulated through a series of progressively smaller arterioles until it flows through capillaries lining the lungs' alveolar sacs. It is here that gas exchange takes place as oxygen is taken up by the blood, and carbon dioxide is released into the waste air.After oxygenation, the fresh blood is circulated back through the bronchial veins and into the pulmonary veins. These run from the lungs and drain into the heart's left atrium. During the systolic phase of the heartbeat, the mitral valve under the left atrium opens and permits blood to pass into the left ventricle. This chamber is heavily muscled and it has the power to pump the oxygen-rich blood out through the aorta and into the rest of the body.

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3 years ago

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during a solar eclipse, the sun apears to go either fully or partially dark. Why can solar eclipses only be observed on certain

KiRa [710]

Answer:

the Moon is smaller than Earth. Only the people in the Umbra will see the sun go totally dark.

Explanation: N/A

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3 years ago

What is the difference between a control group and an experimental group?

Serjik [45]

Control Group: Group that is being controlled .This group doesn´t receive the treatment from the researchers

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3 years ago

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During DNA replication each stands of dna is used as a temple to produce a complementary stand of DNA this process is shown belo

castortr0y [4]

<h2><u>Full question:</u></h2>

During DNA replication, each strand of DNA is used as a template to produce

a complementary strand of DNA. This process is shown below. Which base

will attach to location 2?

A. Adenine B. Allimene C. Thymine D. Tyrosine

<h2><u>Answer:</u></h2>

Base thymine will get attached the location 2.

Option C

<h3><u>Explanation:</u></h3>

DNA replication is the process by which the genetic material that is deoxyribonucleic acid is getting replicated into its daughter DNA by the process which involves a lot of enzymes and energy. This process involves the formation of complementary base pairing between the nitrogen bases present in the nucleotides of DNA.

As the DNA replication starts the enzymes helicase and gyrase comes in action which open up the double stranded DNA which then is acted by DNA dependent DNA polymerase which gets attached to the coding strand of the DNA and starts accumulating the nucleotides from the cytoplasm and nucleoplasm that are complementary to the nitrogen base that is present on the coding strand. This process is very fast and can go up to speed of 30 to 40 base per second. This process is fully based on the complementary base pairing nature of DNA which bring the nucleotide from the nucleoplasm that is complementary to the base present on the coding strand. And this nucleotide is the same that is present on the other strand of the DNA because the DNA double helix contains the the complementary bases that actually forms hydrogen bond between themselves.

Here in the location to we can see that adenine is present as the nitrogen base. The complementary base to adenine is thymine. So the complementary base that will be present there will be thymine itself

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3 years ago

What is a stellar day​

What is a stellar day