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antoniya [11.8K]
4 years ago
12

Select from the drop-down menu to correctly complete the sentence. In order for a chemical reaction to take place, a certain amo

unt of _____ must be present.
A. Chemicals
B. Energy
C. Friction
D. Heat
Biology
2 answers:
MrMuchimi4 years ago
8 0
Chemicals i think but i really don’t know
Trava [24]4 years ago
5 0

Answer:

B. Energy

Explanation:

If there is no energy, nothing can happen.

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The lower rocks in the Muav limestone are 505 million years old. The upper rocks in the Redwall limestone are 340 million years
Alex777 [14]

Unconformity

Explanation:

The gap between the lower and upper limestone layer can be explained by the occurrence of an unconformity.

An unconformity is a break in stratigraphic record usually marked a prolong period of non-deposition or erosion.

A major break of several millions of years is called a hiatus. A minor break is a diastem.

  • During a period of non-deposition, no materials are brought into the basin.
  • This can last for several years until deposition resumes again.
  • Such a prolonged period of non-deposition causes a break in stratigraphic record.
  • At other times, stratigraphic records can be lost to erosion.
  • Erosion entails the washing away of the earth.
  • This will ultimately cause the loss of records between two strata till deposition resumes.
  • In most strata, periods of non-deposition and erosion usually takes place hand in hand.

learn more:

Wind erosion brainly.com/question/2115729

#learnwithBrainly

6 0
3 years ago
Difference of transport in plants and transport in animals​
Eduardwww [97]

Explanation:

Transportation of water and food in plants takes place by vascular tissues such as xylem and phloem Transportation of water and food in animals takes place by Special cells and organs and blood is transported through haemoglobin present in animals and produce energy.

Plz marked as brainliest

8 0
3 years ago
Viruses are not living because
8090 [49]
They cannot reproduce on their own! Hope this helps!
5 0
3 years ago
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People can breed cats for specific traits such as coat color through the process of _____. a. natural selection b. descent with
RSB [31]

Answer:

D. Artificial Selection.

Explanation:

Normal people can't breed cats by modifying their DNA, so options b and c are eliminated. Breeding cats for specific traits is not natural, so it is not choice a, either. Instead, selective breeding is d. artificial selection.

Hope this helps!

8 0
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Nina was almost hit by a bus. however, she is okay, and her parasympathetic system is responding accordingly. nina's parasympath
blondinia [14]
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3 years ago
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