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Semmy [17]
3 years ago
9

What are the three main types of tectonic plate boundaries?

Biology
2 answers:
Paladinen [302]3 years ago
7 0

Answer:A

Explanation:

Anarel [89]3 years ago
5 0

Answer:

A; convergent, divergent, and transform.

Explanation:

A because continental and oceanic are not tectonic plate boundaries. So eliminating the answer choices with those two just leaves A. Convergent, divergent, and transform.

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a hypothetical cell has approximate shape of a shape of a sphere. rhw diameter of thw spherical cell os six units long. another
Lerok [7]

Answer:

The sphere: volume is about 113.1

The cylinder: Volume is about 11309.73

Explanation:

This is done by using the formula for the volume of a sphere ( v=4/3 pi r^3) and the formula for the volume of a cylinder (v=pi r^2 h). You plug in things such as radius, height, and pi or 3.14 into a calculator.

6 0
2 years ago
In a phospolipid, the heads are<br> which<br> means
noname [10]

Answer:

A single phospholipid molecule has a phosphate group on one end, called the “head,” and two side-by-side chains of fatty acids that make up the lipid “tails. ” The phosphate group is negatively charged, making the head polar and hydrophilic, or “water loving.” The phosphate heads are thus attracted to the water

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3 years ago
What is acceleration?
dlinn [17]

Acceleration, in physics, is the rate of change of velocity of an object. An object's acceleration is the net result of any and all forces acting on the object, as described by Newton's Second Law.

4 0
3 years ago
Read 2 more answers
Unlike roots, stems
zloy xaker [14]
Inside the stem are xylem and phloem they transport food and water so I believe the answer is A
6 0
2 years ago
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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
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