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Alex
3 years ago
15

Which of the following organisms have existed on Earth for the longest period of time?

Biology
2 answers:
balandron [24]3 years ago
6 0

Answer:

single-celled organisms

Explanation:

Ira Lisetskai [31]3 years ago
4 0

Answer:

cyanobacteria.. single celled organisms

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Based on the chemical equation, use the drop-down menu to choose the coefficients that will balance the chemica
Olenka [21]

Answer:

2,2, and 1.

Explanation:

I did the assignment and got the answer right.

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3 years ago
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If a plant is grown in the absence of gravity, which type of phototropism will its roots exhibit, and where will auxin accumulat
Simora [160]

Phototropism refers to the growth or movement of an organism (often a plant) in response to light stimulus. Negative phototropism occurs when an organsim grows away from specific chemicals.

  • If a plant is grown in the absence of gravity, its roots will exhibit negative phototropism and auxin hormones will accumulate on the side away from the light source (Option C is correct).

  • In this case, negative phototropism occurs in response to auxin hormones.

  • On the other hand, positive phototropism occurs when a plant grows towards the light source.

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3 0
3 years ago
Sediment composition in a clastic rock is determined by all of the following EXCEPT:
Talja [164]
The answer is <span>D. The type of plant that grew near a river.

A clastic rock is composed of fragments of rock and geological detritus and smaller grains of rock. Its composition is determined by source rock composition and crystals. It can be noticed that the type of plant that grew near a river has nothing to do with its composition.</span>
8 0
4 years ago
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Genetic variability is the most important result of<br> asexual reproduction<br> sexual reproduction
Oduvanchick [21]

Answer:

sexual reproduction

Explanation:

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8 0
4 years ago
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What is the surface-area-to-volume ratio of a cube-shaped cell whose sides are 6 mm long
ikadub [295]

Answer:

the answer is in the explanation

Explanation:

Surface area is

54

c

m

2

, volume is

27

c

m

3

and surface area-to-volume ratio is

2

Explanation:

If

s

is the side of a cube, then its surface area is

6

s

2

and its volume is

s

3

Hence, if the sides of a cube are

3

inches long

its surface area is

6

×

3

2

=

6

×

9

=

54

c

m

2

,

its volume is

3

3

=

27

c

m

3

and surface area-to-volume ratio is

54

27

=

2

8 0
4 years ago
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