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tensa zangetsu [6.8K]
3 years ago
14

Using a __ clock, scientists are able to estimate the amount of time that two species have been evolving independently

Biology
2 answers:
Sergio039 [100]3 years ago
8 0
The answer is a molecular clock
romanna [79]3 years ago
4 0
Using a molecular clock, scientists are able to estimate the amount of time that two species have been evolving independently.

Hope this helps :)
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In "simple columnar epithelium," which word describes cell shape and which word describes the number of cell layers?
dolphi86 [110]

Answer:columnar describes cell shape.

Simple describe the number of layers

Explanation: epithelial tissues are one of the four major tissues of the body.the others being nervous, muscular, connective tissues.

Epithelial tissues are made up of thin cells that cover the external and internal surface of the body.

The cells may form one layer or more and they occur in several shapes.if they form one layer ,it is called simple.if they form several layers,it is called stratified.

Some are called pseudo-stratified because the cells occur with varying lengths and give the impression of stratified but they are actually made up of one layer.

Simple columnar epithelium is a single layer of tall, closely packed cells. They possess cellular extensions ,such as microvilli in the small intestine, or the cilia in the female reproductive tract.

3 0
3 years ago
What does this sprout need to grow into a healthy plant?
nata0808 [166]

Answer:

Plants need water, warmth, nutrients from the soil, and light to continue to grow.

Explanation:

hope this helps

plz mark brainliest

5 0
2 years ago
Read 2 more answers
Impulses originating in the part of the brain called the medulla would most directly affect which body structure?
gtnhenbr [62]

The question is incomplete. The complete question is:

Question: Impulses originating in the part of the brain called the medulla would most directly affect which body structure?

a. A leg muscle

b. A ligament

c. An arm bone

d. The heart

Answer:

d. The heart

Explanation:

The medulla oblongata contains a number of reflex centers for regulating vital body functions such as heartbeat, breathing, and vasoconstriction. The medulla contains several nuclei, a collection of neuronal cell bodies.

For example, impulses originated in the cardiovascular center regulates the rate and force of the heartbeat and the diameter of blood vessels. Impulses from the cardiovascular center flow along sympathetic and parasympathetic neurons. An increase in sympathetic stimulation from the cardiovascular center of medulla increases heart rate and contractility while a decrease in sympathetic stimulation decreases heart rate and contractility.

5 0
3 years ago
What phrase best defines a star system? a group of hundreds of stars a group of two or more stars a group of stars that formed a
MAVERICK [17]

There are different star systems. Binary star systems consist of two stars. Multiple star systems consist of two or more stars. The meaning of star system is "A small number of stars."

I think it's either A) a group of hundreds of stars, or B) a group of two or more stars. I would assume it's B), but i could be wrong.

Hope this helps!


4 0
3 years ago
Read 2 more answers
What is the best explanation for way a cell might shrivel
Nataliya [291]

The water solution in the environment surrounding the cell has a higher solute concentration than the cell.

Hope this helps!

-Payshence

7 0
3 years ago
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