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Alex17521 [72]
3 years ago
11

What is the substance found in cell walls of diatoms

Biology
2 answers:
Katen [24]3 years ago
7 0

Answer: opaline silica

Explanation:

kipiarov [429]3 years ago
3 0
Opaline silica
Diatoms are single called algae
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Give three examples of the color changes that can be seen with pH indicators.
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IndicatorLow pH colorHigh pH colorBromocresol greenyellowblueMethyl redredyellowMethyl purplepurplegreenAzolitmin (litmus)redblue

3 0
2 years ago
Which statement is a scientific theory?
BARSIC [14]

Answer:

Acceleration of an object increases as the force of an object increases is the scientific theory. Hope this helps :)

Explanation:

5 0
2 years ago
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In class, your professor shows you the skulls of three mammals. In one, the eye would be fully enclosed by bone. In the second,
zheka24 [161]

Answer:

C

Explanation:

It is more probable that the third one has a more developed sense of the vision with a large eye, and its movements. Also with a opened back to receive its nutrition and optic nerve.

Sources:

Zihlman, Adrienne. (2006). «The Ape in the Tree». International Journal of Primatology (en inglés) 27 (4): 1227-1228

8 0
3 years ago
Cell theory states that all living things contain one or more cells. Why do you think cell theory meets the definition of
ziro4ka [17]

Answer:

Cell theory meets the definition of a scientific theory  because it can be proven, it has been tested for a long period of time and therefore there are many evidences that support the theory but not enough to become a law. Well scientific laws are statements based on repeated experiments or observation, but also, a law is something that always applies under the same conditions. Evolution occurs in the characteristics of living things within a species overtime. . A theory is much more complex: it explains why something happens. A law only describes what happens.

The cell theory meets the definition of a scientific theory but i do not think it should be a scientific law.

Explanation:

4 0
3 years ago
Binding of ________________ to receptors (ligand-gated) on the sarcolemma at the neuromuscular junction is vital for depolarizat
kifflom [539]

Answer:

Binding of   <u>ACh (acetylcholine)  </u>  to receptors (ligand-gated) on the sarcolemma at the neuromuscular junction is vital for depolarization of the muscle fiber.

Explanation:

It allows acetylcholine to be released into this synapse when an action potential hits a neuromuscular junction. Acetylcholine attaches to the nicotinic receptors localized on the post-synaptic membrane of the muscle fibre's motor end plate, a specialized region.

Hence , the answer is  <u>ACh (acetylcholine) .</u>

8 0
3 years ago
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