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larisa [96]
3 years ago
9

What is catastrophism

Biology
1 answer:
scoray [572]3 years ago
4 0

the theory that changes in the earth's crust during geological history have resulted chiefly from sudden violent and unusual events.

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This is a solid substance that is composed of minerals.
Roman55 [17]

Answer: The answer is rock.

Explanation: A rock is a a solid substance in which it is composed of large quantities of one mineral, or contains 2 or more minerals.

8 0
3 years ago
Put the following events in the correct order:
Wewaii [24]

Answer:

Explanation:

c. Transcription of one DNA strand results in mRNA, which is a complementary copy of the information in the DNA.

a. The mRNA leaves the nucleus and goes to a ribosome open choices for ranking.

b. The building blocks of proteins, are carried to the ribosome by tRNAsAmino acids.

The process of deoxyribonucleic acod starts with replication to transcription and translation.

Replication involves the formation of a complementary base from a old or template DNA Strand this then serve as a template for transcription.

transcription involves the coping of information on the DNA to an intermediate mRNA ( messanger ribonucleic acid) in the nucleus which then move from the nucleus to ribosome in the cytoplasm where translation occurs.

Translation is the conversion of the information on the mRNA to an amino acid with the help of enzyme transferse ribonucleic acid(tRNA).

Hence the arrangement is from C ---- A-----B.

3 0
3 years ago
wo events in space are described below. Event 1: The moon travels between the sun and Earth and prevents the sunlight from reach
Charra [1.4K]
The answer is Event 1. A solar eclipse occurs when the moon gets between the sun and Earth and blocks the sunlight from reaching Earth's surface during daytime, thus casting a shadow over Earth. A lunar eclipse as represented by Event 2 happens when the moon passes into the shadow of Earth at night and we can see the moon darken.
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3 years ago
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Scientists infer that oxygen first began to enter Earth's atmosphere after the appearance of
GenaCL600 [577]

Oxygen entered the Earth's atmosphere after the appearance of the Great Oxidation Event (Great Oxygenation Event). The Great Oxidation is the first mass extinction on Earth.

The Great Oxidation lasted 2.4 to 2.0 billion years ago.

Oxygen appeared on Earth thanks to cyanobacteria using photosynthesis.

8 0
3 years ago
What type of stimulus is required for an action potential to be generated? What type of stimulus is required for an action poten
Ivahew [28]

Answer:

A threshold level depolarization.

Explanation:

In a neuron, the action potential threshold is known as the point of depolarization where the neuron fires, when the neuron reaches a point, it will fire and if it does not reach the point of depolarization, it will not fire and it helps to transmit the information to another neuron.

A neuron transmits the information with the help of electric impulses which are sent through its axon. When a neuron in an inactive phase, more +ve charged ions recline outside the axon membrane. In the process of stimulation, the axon membrane admits more Na+ ions and providing the neuron more +ve charge.

3 0
3 years ago
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