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aalyn [17]
3 years ago
7

A. 150 million years ago b. 140 million years ago c. 120 million years ago

Biology
2 answers:
Burka [1]3 years ago
8 0
A goes to #3, B goes to #2, and C goes to #1
harkovskaia [24]3 years ago
5 0

Answer:

c 1

b2

a3

Explanation:

There are gaps in the fossil record because many early forms of life were soft-bodied, which means that they have left few traces behind. What traces there were may have been destroyed by geological activity. This is why scientists cannot be certain about how life began.

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Pls help me pls idk how to do this​
Rama09 [41]

Answer:

Cycle: A repeated pattern, The sun: The orgin for the water cycle, The water cycle: The process by which water circulates between the oceans, atmosphere, and land, Evaporation: The sun heats up water and turns it into vapor, Condensation: Water vapor in the air that gets cold and turns into water, Percipitation: water that falls in the form of snow, rain or hail.

5 0
3 years ago
A/an _______ bond allows metals to conduct electricity. A. metallic B. atomic C. ionic D. covalent
damaskus [11]
A. metallic   

I gotta use 20 characters so ignore this bucko

3 0
3 years ago
The half — life of nickel is 96 years. How much of a 30-gram sample is left after 270 years?
-Dominant- [34]

The amount of the 30 gram-sample that will remain after 270 years is 6.61 grams

<h3>How to determine the number of half-lives </h3>

We'll begin by obtaining the number of half lives that has elapsed. This can be obtained as follow:

  • Half-life (t½) = 96 years
  • Time (t) = 270 years
  • Number of half-lives (n) =?

n = t / t½

n = 270 / 99

n = 2.8125

<h3>How to determine the amount remaining </h3>
  • Original amount (N₀) = 30 grams
  • Number of half-lives (n) = 2.8125
  • Amount remaining (N) =?

The amount remaing can be obtained as follow:

N = N₀ / 2^n

N = 30 / 2^2.8125

N = 6.61 grams

Learn more about half life:

brainly.com/question/26374513

#SPJ1

5 0
1 year ago
55 Which of the following is an advantage of
Savatey [412]

<u>Answer</u>:

"It increases the mutation rate"  is an advantage of  sexual reproduction

<u>Explanation</u>:

The basic thing of evolution is fundamental, as it helps in generation of genetic variation on which the selection can act. Sexual reproduction leads to genetic diversity, and this genetic diversity leads to increase the mutation rate. Genetic diversity occurs because of two various cells which are combining together and biological assortment which happens at the time of cell division. Neutral genetic diversity in the population leads to high mutation rate.  

4 0
3 years ago
PLEASE HELP!!!!!! 50 POINTS
rusak2 [61]

Answer:

Molluscs have more varied forms than any other animal phylum. They include snails, slugs and other gastropods; clams and other bivalves; squids and other cephalopods; and other lesser-known but similarly distinctive subgroups. Although it is impossible to know the subjective experience of another animal with certainty, the balance of the evidence suggests that most invertebrates do not feel pain. The evidence is most robust for insects, and, for these animals, the consensus is that they do not feel pain. In general, mollusks have 3 body regions: a head, a visceral mass, and a "foot." The head contains the sense organs and "brain," while the visceral mass contains the internal organs. Mollusks usually have a shell (although some do not). Mollusks also have an extension of the body wall called the mantle.

Explanation:

6 0
2 years ago
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