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insens350 [35]
3 years ago
14

Complete the sentence:

Biology
1 answer:
fomenos3 years ago
6 0
Re: A car driver automatically brakes if a child dashes across the road.
<span>This is called a .............................................. reaction.
answer: reflex</span>
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If you cry a lot, would you eventually go blind?
Maslowich

Answer:

No, you would not go blind, even though the composition of emotional tears are different.

6 0
3 years ago
Read 2 more answers
Which of these is always part of using the scientific method?
MrRa [10]
Since you provide no options, here are the usual parts of scientific method :

- Idea / question which answer you want to find out
- Research , collecting all kinds of data
- Hypothesis , an explanation that is made at the starting point, before the experiment
- Experiment , to find out whether your hypothesis is right
- Analyze the data that you got from the experiment
- Conclusion, your final judgement based on the result of your experiment

6 0
3 years ago
Plants maintain higher levels of phytochrome at their growing tips where phytochrome plays important roles in growth responses t
Naddika [18.5K]

Explanation:

Phytochrome is a protein with kinase activity present in plant organisms, whose function is to act as a photoreceptor mainly of red light (600-700nm) and distant red light (700-800nm), thanks to its chromophore. The phytochrome depending on the type of light detected can trigger different responses in the plant, such as flowering, germination, growth as an escape response to the shadow -development of epicotyls at night and cotyledons during the day-, regulation of expression of metabolic activity during day and night (circadian rhythms).

Phytochromes were discovered in the fifties as part of an investigation on the effect of light on the germination of lettuce seeds. It was observed that the seeds that germinated in the dark did not reach 20%; On the contrary, the germination percentage was maximum when the seeds were irradiated with a pulse of red light (R). It was also found that subsequent irradiation with a pulse of distant red light (RL) nullified the inducing effect of red light, preventing germination.

Alternating irradiation with light R and RL (R, R + RL, R + RL + R, R + RL + R + RL, etc.) showed that the last color applied determined the germination of the seeds and that the light red was the stimulating factor of the process and, its inhibitor, the distant red light.

In search of an explanation of such phenomena, the existence of a pigment was proposed, which they called phytochrome, which absorbed the red light. The phytochrome in question, after absorbing red light, became a way capable of absorbing distant red radiation; form that turned to its initial condition after performing said absorption. The hypothesis found experimental support in the early sixties with the purification, from extracts of cereal seedlings, of a protein endowed with the predicted characteristics. Phytochromes are soluble proteins found in the seeds, leaves, stems, roots and other organs of the plant.

Biochemically, phytochrome is a protein with a Bilin chromophore.

6 0
3 years ago
Hi pls answer fast<br><br>Function of haemoglobin in the blood​
Marizza181 [45]
<h2>it carries oxygen from the lungs to rest of the body.</h2><h2>This is a fast function and i hope it helps...</h2>
8 0
3 years ago
State one effect the reintroduction of the wolf may have on the coyote population within the Adirondacks
Masteriza [31]

Answer:

Decrease in the population of coyote occurs after the reintroduction of the wolf within the Adirondacks  effect.

Explanation:

Wolves are the top predator in the ecosystem. They hate coyote and kill them and sometime eat them too. So the reintroduction of the wolf decreases the population of coyote by killing them directly and by consuming the prey and the coyote die due to hunger. Coyote feed on rabbit, snakes, deer, fruits and grasses so decrease in coyote population increases the availability of grasses and other animals for different animals.

5 0
3 years ago
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