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3 years ago

The life forms exhibiting the simplest cellular structure are?

1 answer:

const2013 [10]3 years ago

3 0

Prokaryotes are the Earth`s firs living things. This are the simplest life forms exhibiting ( showing ) cellular structures.
They exist in 2 major forms:
- Eubacteria ( most of the common bacteria that are found everywhere ),
- Archaebacteria ( ancient bacteria that live in very extreme conditions ).
Answer: Prokaryotes.

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"after 12 hours without eating, seth is very hungry. it is likely that seth's blood glucose level is _______________ and his blo

viva [34]

After 12 hours without eating, Seth is very hungry. It is likely that Seth's blood glucose level is LOW and his blood insulin level is HIGH.
A situation in which the blood glucose level is low is called hypoglycemia. In this situation, the level of glucose in the blood is much more lower than the normal level. This may be caused by a lot of factors. When the blood glucose level is low, the glucagon hormone mobilize the liver to release glycogen which is converted to glucose. The presence of glucose in the blood increase the level of insulin secretion which in turn increased the feeling of hunger in the individual.

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4 years ago

Proteins may be classified according to their three-dimensional shapes. Determine whether the following examples and description

m_a_m_a [10]

Answer:

-often function as enzymes or transport proteins ⇒ globular proteins

-peptide chains arranged in long strands, or fibers ⇒ fibrous proteins

-peptide chains highly folded into spherical shapes ⇒ globular proteins

-keratins ⇒ fibrous proteins

-hemoglobin ⇒ globular proteins

-water-soluble ⇒ globular proteins

-collagens ⇒ fibrous proteins

-insoluble in water ⇒ fibrous proteins

-generally function in structure and support ⇒ fibrous proteins

Explanation:

Fibrous proteins are composed by large polypeptide chains which interact each other and form large structures. They have water insoluble and have structural and protection functions- they are components of cells and tissues. Examples are: collagen, fibronectin, keratin, elastin, actin.

Globular proteins have a spherical compact structure in which hydrophobic aminoacids are buried inside the structure and hydrophilic aminoacids (which can interact with water molecules) are exposed to the exterior medium. For this, they are water soluble. They have often transport and catalytic functions. For example: hemoglobin, mioglobin, albumin, enzymes in general.

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3 years ago

Which organelles are labeled D?

LUCKY_DIMON [66]

<h3>Answer;</h3>

Centrioles 

<h3>Explanation;</h3>

Centrioles are organelles that are only found in animal cells.
Centrioles are important organelles that functions by helping the process of cell division in animal cells. This is by helping the formation of spindle fibers whose role is to separate chromosomes during cell division.
Additionally, centrioles also play a very important role in celiogenesis, the formation of cilia and flagella on the surface of cells. The cilia and flagella enhance the movement of cells.

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3 years ago

Read 2 more answers

In the Susan Solomon, Web of Science article, what does the reader uncover in the abstract?

kow [346]

Answer:

the conclusive evidence about CFCs (chlorofluorocarbons) and the ozone layer of the earth.

Explanation:

Susan Solomon, Web of Science article reveals the conclusive evidence that CFCs (chlorofluorocarbons) could be destroying the protective layer of ozone in the earth’s upper atmosphere. CFCs are compounds that have the potential to destroy the protective layer of ozone (an oxygen compound) in the earth’s upper atmosphere.

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3 years ago

9. How is it possible that you can have matter in your body that was once in a dinosaur?

yKpoI14uk [10]

When animals eat food, they get carbon in the form of carbohydrates and proteins. ... The oxygen (O2) from the CO2 molecule was sent back into the atmosphere; the carbon atom (C) was detached and used to make a molecule of sugar.

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2 years ago