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Marrrta [24]
3 years ago
9

RNA and DNA are both examples of _____ made from nucleic acids.

Biology
2 answers:
Annette [7]3 years ago
7 0

Answer:

Molecules

Explanation:

Is this right

STALIN [3.7K]3 years ago
6 0

Answer:

b. molecules

Explanation:

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A giant tortoise traveling at 0.3 km/hr would take how many hours to complete a marathon(42km)
larisa [96]

140 h

Explanation:

speed =distance/ time

so rearrange the formula

time= distance/ speed

time = 42/0.3

time = 140 h

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2 years ago
Question 18
kolbaska11 [484]

Answer:

in the population of rabit there can be four different coat colors

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3 years ago
What type of ion channels in the membrane of neurons open or close in response to a neurotransmitter binding to its receptor
bagirrra123 [75]

An ion channel in the membrane of neurons which <u>open or close</u> in response to a neurotransmitter that binds to its receptor is called:  ligand-gated channel.

<h3>What is an action potential?</h3>

An action potential can be defined as a sudden, fast change in electrical (voltage) potential with respect to the transmission of an impulse to a receptor, across a cellular membrane such as:

  • A nerve cell
  • A muscle cell

<h3>What is a neuron?</h3>

A neuron is a nerve cell that is saddled with the responsibility of transmitting electrical impulses down an axon across a cellular membrane of the body of a living organism through an action potential.

In Science, a ligand-gated channel is a type of ion channel in the membrane of neurons which <u>open or close</u> in response to a neurotransmitter that binds to its receptor.

Read more on neurons here: brainly.com/question/13076783

4 0
2 years ago
Identify each event as the result of mechanical weathering or chemical weathering.
kow [346]

<h3><u>The following events are identified as chemical weathering:</u></h3>
  • The minerals in a marble statue react with water to form acids and pores in the structure.
  • The rocks in a region are streaked orange after being exposed to repeated rains.

<em><u>Reason: </u></em>

When the weathering process occurs due to <em>chemical reaction</em>, then it is considered as chemical weathering.

In <em>the first case</em>, minerals of marble statue are <em>reacting</em> with water to cause weathering. In the <em>second case</em>, due to the <em>acidificaion reaction</em>, the change of the color has happened after exposure to the repeated rains.

<h3><u>The following events are identified as Mechanical weathering:</u></h3>
  • A piece of rock crumbles after being constantly thrashed by strong waves.
  • Industrial runoff forms cracks in a rocky structure in its path.

<em><u>Reason:</u></em>

When the rock is broken into simple pieces <em>without any chemical reaction </em>it is considered as mechanical weathering.

In the <em>first cause</em>, due to the <em>abrasion</em> caused by the strong waves, weathering has happened, in the <em>second case</em> industrial run off may be of varying temperature and thus may cause <em>heating or cooling</em> of the rock and causes weathering.

8 0
3 years ago
which of the following fields of science supports evolution? a. astronomy b.geology c.biology d. all of these
lara [203]

Answer:

Explanation:

biology of your talking about life evolution but all if your talking about mankind evolution and technology

5 0
3 years ago
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