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slavikrds [6]
3 years ago
15

All of the following are ways we depend on the Sun, EXCEPT:

Biology
1 answer:
lapo4ka [179]3 years ago
6 0
The Sun does not provide us with Vitamin A, so answer A.
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How will a seedling grow if it receives no light?
Rainbow [258]

Answer:

If we look at the matter from the gardener's point of view, however, we can use the rule of thumb that most cultivated plants on sale in seed form prefer to germinate in the dark. There are some notable exceptions however, some greenhouse perennials, epiphytes, many grasses, and even tobacco all prefer light and a large number of seeds are not fussy either way.

The reason is that commercially produced seed is bred and selected for its ease of germination as well as other more obvious characteristics and so peculiarities such as light or dark requirements do not often occur. On the other hand seed which is obtained non-commercially, in small quantities from the home gardener, seed lists, or the more unusual items from seed merchants may prove to be much more fussy in its requirements.

6 0
3 years ago
The opening of which of the following types of ion channels will lead to a depolarization? A chemically gated sodium channel 2)
nikitadnepr [17]

All of them will lead to depolarisation.

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

Depolarisation is a phenomenon ebochor occurs in the excitable tissues of our bodies, namely the neurons and the muscle T junctions. Here the membrane is already polarised by means of difference in charges as well as concentration of ions on both sides of the cell membrane. With a single stimuli, this change in concentration is gone, and this is de polarisation.

This phenomenon occurs because of the opening of the ion channels like potassium channels and sodium channels which leads to a diffusion of ions from both sides to the other achieving a more or less equal concentration on both sides of cell membrane.

Now this opening of the ion channels can be triggered by means of different stimuli. In case of neurons, the opening of the post synaptic ion channels are guided by the chemical impulse taking in synapse.

In case of inter neuron transfer, the ion channels open due to change in voltage of the previous part of the axon.

In case of organ of Corti, the sodium channels open due to mechanical events occurring inside cochlea. So ion channels can open in any form will lead to change in potential.

6 0
3 years ago
Puffer fish poison blocks voltage-gated sodium channels like a cork. what effect would this neurotoxin have on the function of n
mixer [17]

The correct answer is that the axon would not be able to produce action potentials.

Majorly all the pufferfish comprises of tetrodotoxin, an element that produces foul tasting and is generally lethal to fish. In the case of humans, tetrodotoxin is hazardous, that is, up to 1200 times more poisonous in comparison to cyanide. There is an adequate toxin in one pufferfish to kill 30 adult humans and there is no antidote.


8 0
3 years ago
Please help me!! <br> thank you have a great day!
skelet666 [1.2K]

Answer:

Sentence 1: All organisms contain many cells

Explanation:

Some organisms, called unicellular organisms, only have one cell

4 0
2 years ago
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Which of the three major environmental problems is the most challenging because it is irreversible
drek231 [11]
Answer choices please. If there are any.

8 0
4 years ago
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