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sweet-ann [11.9K]
3 years ago
9

Did unicellular or multicellular life appear first ?

Biology
1 answer:
Fiesta28 [93]3 years ago
8 0

Answer:

unicellular life first

Explanation:

it arose billions of years ago while multicellular life forms around at least 600 million years ago

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Match each level of organization to its correct description.
krek1111 [17]

An organ is a group of two or more tissues working together to perform a function. Hence, the organ can be correctly matched with 3.  

The tissue is a group of specialized cells working together to perform a specific function. Hence, tissue can be correctly matched with 5.  

An organ system is a group of organs working together to perform a function. Hence, organ system can be correctly matched with 2.  

An organism refers to a group of organ systems working together to exhibit the six characteristics of life. Hence, the organism can be correctly matched with 1.  

A cell is the smallest fundamental unit of life. Hence, the cell can be correctly matched with 4.  


6 0
3 years ago
All living organisms are part of their environment which is composed of biotic and abiotic factors that interact with each other
lbvjy [14]

Explanation:

its called ecological interaction

6 0
3 years ago
Epigenetics refers to a special kind of hereditary mechanism. Epigenetic changes do not change the DNA nucleotide sequence, yet
Greeley [361]

<u>Answer:</u>

The type of change that was responsible was “histone acetylation or DNA methylation”.

<u>Explanation:</u>

  • Histone acetylation is the process that involves the epigenetic adjustments that functions in the transcription process while regulating DNA.
  • Histone acetylation or DNA methylation is the major component of the gene regulation while passing from one generation to another.
  • The Acetyl groups are hooked up to lysine’s in histone tails so their charges play a vital role to avoid the histone tail to bind with the other molecules.
8 0
3 years ago
In each generation, the wings of experimental fruit flies were clipped short for fifty generations. The fifty-first generation w
Rufina [12.5K]

N an experiment, suppose that the wings of fruit flies were clipped short for fifty generations. The fifty-first generation emerged with normal-length wings. This observation would tend to disprove the idea that evolution is based on

a. inheritance of natural variations

b. inheritance of acquired characteristics

c. natural selection

d. survival of the fittest

Inheritance of acquired characteristics. Thus, option "B" is correct.

<h3 /><h3>What is inheritance of acquired characteristics?</h3>

For fifty generations wings of fruit flies were clipped. Hence they acquired this trait in their lifetime and not genetically. If acquired characteristics were capable of passing on to next generation, 50 generations would have been enough to inculcate this clipped wing trait in fruit flies. Despite it, the fifty-first generation did not have clipped wings.

Hence evolution can not occur without genetic variation. A character simply acquired in a lifetime does not create a difference in germ cells and hence is not enough to be passed on to next generation or cause evolution

To learn more about genetic variation click here:

brainly.com/question/848479

#SPJ1

3 0
2 years ago
In which of the following types of infection will the infected host cell burst?
Marizza181 [45]

Answer:

D) lytic infection

Explanation:

During lytic infection, a virus enters the host cell, makes a copy of itself, and causes the cell to burst, or lyse.

5 0
3 years ago
Read 2 more answers
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