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amid [387]
3 years ago
8

Why is it significant that pollen contains a multicellular male gametophyte instead of just male gametes?

Biology
1 answer:
Mars2501 [29]3 years ago
8 0

Answer:

The given options are false regarding the question, the correct answer should be -

multicellular male gametophyte has a non-gamete cell that controls growth and development to the pollen tube and the male gamete.

The importance of these nongenetic cells of the male gametophyte is to control the development and growth of pollen tube that is an essential structure for pollination and fertilization.

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3 years ago
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The glomerulus differs from other capillaries in the body in that it ________.
zhuklara [117]

Answer:

The correct answer is "is drained by an efferent arteriole".

Explanation:

The missing options of this question are:

A) has a basement membrane

B) is impermeable to most substances

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D) has a blood pressure much lower than other organ systems

The correct answer is option C) "is drained by an efferent arteriole".

The glomerulus are a network of small blood vessels that are specialized to function within the kidneys. The role of the glomerulus is to filter plasma and being one of the steps of water absorption in the kidneys. The glomerulus differs from other capillaries in the body in that it is drained by an efferent arteriole, which carry the blood that has already filtered by the glomerulus.

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3 years ago
Consider a helminthic infection in which an individual is colonized by a parasitic worm. The worm is too big to be engulfed by a
Assoli18 [71]

Answer

The worm gets coated with antibodies, which activate other cells in the immune system to secrete chemicals that kill it.

Explanation:

Production of T-helper I cytokines like IFN gamma, IL-2 and IL-18 is highly protective against helminth infection by activating the macrophage intracellular killers. Protection against mucosal eosinophil responses in which antiparasitic chemicals are released. Killing also involves direct cytotoxic mechanisms in which T- cell and NK-cells directly release antiparasitic agents like perforin and granulysin which kill the parasite.

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What is An estuary according to biomes
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3 0
3 years ago
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