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nevsk [136]
3 years ago
8

Which organelle acts as the post office of the cell?

Biology
1 answer:
frozen [14]3 years ago
5 0
The GOLGI APPARATUS. it packages and modifies and sends stuff outta the cell. 

:)
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Plant roots absorb ammonium ions and nitrate ions for use in making molecules such as DNA, amino acids, and proteins
Scorpion4ik [409]

Answer:

Assimilation

Explanation:

Plant roots absorb ammonium ions and nitrate ions in the process of assimilation to use these ions to make molecules like <em>DNA, amino acids, and proteins</em>.

Animals cannot absorb these ions directly; hence they need to consume these plants for the nutrient supplies.

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3 years ago
How did fossils help study life
Marizza181 [45]

Answer: By studying the fossil record we can tell how long life has existed on Earth, and how different plants and animals are related to each other. Often we can work out how and where they lived, and use this information to find out about ancient environments. Fossils can tell us a lot about the past.

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3 years ago
The organ that surrounds the urethra and secretes an antibiotic protein is the
Black_prince [1.1K]

The Prostate gland

The prostate is a walnut-sized organ that surrounds the first part of the urethra. It is located between the bladder and the penis. Semen is formed by the prostate by combining a thick white fluid it initially produced with the sperm from the testicles. It also produces an antibiotic protein known as prostate-specific antigen (PSA) that changes the semen into liquid.






8 0
3 years ago
why would having both polar and nonpolar properties in a protective boundary be advantageous for the cell?
Reika [66]

Explanation:

The polar nature of the membrane’s surface can attract polar molecules, where they can later be transported through various mechanisms. Also, the non-polar  region of the membrane allows for the movement of small non-polar molecules across the membrane’s interior, while preventing the movement of polar molecules, thus maintaining the cell’s composition of solutes and other substances by limiting their movement.

Further explanation:

Lipids are composed of fatty acids which form the hydrophobic tail and glycerol which forms the hydrophilic head; glycerol is a 3-Carbon alcohol which is water soluble, while the fatty acid tail is a long chain hydrocarbon (hydrogens attached to a carbon backbone) with up to 36 carbons. Their polarity or arrangement can give these non-polar macromolecules hydrophilic and hydrophobic properties i.e. they are amphiphilic. Via diffusion, small water molecules can move across the phospholipid bilayer acts as a semi-permeable membrane into the extracellular fluid or the cytoplasm which are both hydrophilic and contain large concentrations of polar water molecules or other water-soluble compounds.

Similarly via osmosis, the water passes through the membrane due to the difference in osmotic pressure on either side of the phospholipid bilayer, this means that the water moves from regions of high osmotic pressure/concentration to regions of low pressure/ concentration to a steady state.

Transmembrane proteins are embedded within the membrane from the extracellular fluid to the cytoplasm, and are sometimes attached to glycoproteins (proteins attached to carbohydrates) which function as cell surface markers. Carrier proteins and channel proteins are the two major classes of membrane transport proteins; these allow large molecules called solutes (including essential biomolecules) to cross the membrane.

Learn more about membrane components at brainly.com/question/1971706

Learn more about plasma membrane transport at brainly.com/question/11410881

#LearnWithBrainly

5 0
3 years ago
In 1969, whittaker proposed moving the __________ from the kingdom plantae to a separate kingdom due to structural and metabolic
wolverine [178]
In 1969, whittaker proposed moving the prokaryotes from the kingdom plantae to a separate kingdom due to structural and metabolic differences.
4 0
3 years ago
Read 2 more answers
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