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3 years ago

Imagine you are an astronomer who recently discovered a star with a system of planets. What

1 answer:

3 0

The planets closest to the star are rocky planets formed by elements with high melting points. Moreover, planets far away are gaseous planets and they are composed of elements with lower melting points.

<h3>Rocky planets and gaseous planets</h3>

The rocky planets consist of silicate rocks and/or metals, whereas gaseous planets are mainly composed of hydrogen and helium.

The rocky planets of the solar system include planets closest to the sun, i.e., Mercury, Venus, the Earth, and Mars.

The gaseous planets of the solar system include faraway planets, i.e., Jupiter, Saturn, Uranus, and Neptune.

Learn more about rocky planets here:

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Which viral genome is likely to require an RNA-dependent RNA polymerase for transciption upon viral entry?

Inga [223]

Answer:

(-) sense single-stranded RNA

Explanation:

Negative sense refers to viruses that use the negative sense single stranded RNA as their genetic material.

It is essential for the negative viral strand is complimentary to the mRNA so it is converted to a positive RNA by RNA polymerase.

Negative sense single stranded RNA virus require an RNA dependent RNA polymerase for transcription. This is because it essential in encoding proteins by catalyzing the complimentary RNA strand to the given RNA tempelate.

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3 years ago

The plasma cells of the immune system are responsible for secreting protein antibodies into the bloodstream. Within the plasma c

Butoxors [25]

Answer:

Ribosomes, endoplasmic reticulum, Golgi apparatus, vesicles.

Explanation:

The endomembrane system in eukaryotes has divided the cell organelles into the structural and functional unit. This system plays an important role in the protein processing, its sorting and transport of protein.

The protein is prepared from the plasma cells. The antibodies is made on the ribosomes by the translation process. From the ribosomes, it will move to the endoplasmic reticulum for the glycosylation and protein folding. Then it moves to the golgi for the further protein packaging and processing. With the help of the vesicles it moves to its destination part in the cell.

Thus, the correct answer is option (d).

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3 years ago

When blood glucose levels decrease, in between meals, during fasting or from starvation, increased levels of ________ help to in

JulijaS [17]

Answer:

B. Glucagon

Explanation:

Glucagon is a pancreatic hormone, secreted by the alpha cells of islets of Langerhans. Whenever the blood glucose level falls, glucagon is released to increase the blood glucose levels. This function of glucagon is quite opposite to the function of insulin and hence both are antagonistic hormones. Insulin reduces the blood glucose where as glucagon increases the blood glucose.

Glucoagon is large polypeptide of 29 amino acids. Since it helps in increasing the blood glucose homeostatic levels it is called as hyperglycemic hormone. It does so by stimulating certain processes such as:

- Stimulating Glycogenolysis i.e breakdown of glycogen to release more glucose from liver.

- Stimulating Gluconeogenesis i.e. synthesis of glucose from non-carbohydrate sources like proteins.

- Glucagon inhibits the process of glycogenesis i.e. synthesis of glycogen, the storage form of glucose.

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3 years ago

Which of the following is used as evidence in supporting the idea that life changes over time?

ikadub [295]

The Answer Would Be

B. <span>the similarities in the body systems such as the nervous and circulatory systems

Hope This Helps

Plz Mark Branliest

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3 years ago

Read 2 more answers

Which structure is not unique to plant cells? chloroplast central vacuole cell wall nucleus

Dafna1 [17]

Chloroplast should be the answer.

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3 years ago

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