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SIZIF [17.4K]
3 years ago
12

How old is our species Homo sapiens

Biology
1 answer:
lianna [129]3 years ago
4 0
It is from the Ice Age

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The Proteobacteria are phylogenetically diverse. Interestingly, closely-related organisms may have very different metabolisms wh
Tju [1.3M]

Answer:

-mutations

-exchanges of genetic material between mature, adult organisms

-the introduction of viral genes through lysogenic infections

-genes being passed from parents to offspring

Explanation:

6 0
3 years ago
A graduated cylinder contains 10mL of water. A rock is dropped into the cylinder and the water level rises to 17mL. What is the
Travka [436]

Answer:

<h3>7 milliliters or 7 cubic centimeters</h3>

Explanation:

1 cubic centimeter = 1 milliliter

You can measure the volume of a rock using cubic centimeters because rocks do not have a defined shaped so you have to use water displacement to find the volume of a rock. If you had a defined shape there are different methods but for an undefined shape( rocks) you use this method.

To solve all you have to do is know how much there was in the container without the rock then how much there was with the rock. Then you take the total and subtract the original measurement you had.

17-10=7 mL or 7 cubic centimeters

5 0
3 years ago
Read 2 more answers
how can scientists accurately compare atmospheric composition today with atmospheric composition thousands of years ago?
Vinil7 [7]

Answer:

They accurately compare the current atmosphere with the previous one, by assessing the amount of atmospheric gases present today, with the amount of atmospheric gases trapped in ice cores that they believe are millennial, that is, they have existed for thousands of years ago.

Explanation:

As we know, it is difficult to compare current characteristics of the planet earth with characteristics that the planet had in the past, thousands of years ago. This is because the ancient characteristics on earth are not fully available to be analyzed, since most of them have been modified over time.

To do this, scientists need to find factors that may have existed thousands of years ago and assess whether these factors have any account of the characteristics of the earth. In the case of atmospheric characteristics, it is common for scientists to compare the current atmosphere with the atmosphere of thousands of years ago, with the assessment of the amount of atmospheric gases trapped in ancient ice cores, with the amount of atmospheric gases present in the atmosphere today.

3 0
3 years ago
- When will an absorption line will appear in a spectrum?
Tatiana [17]
An absorption line will appear in a spectrum if an absorbing material is placed between a source and the observer.
5 0
3 years ago
Hurry please help How does filtration occur during the formation of urine?
e-lub [12.9K]
<h3>Hurry please help How does filtration occur during the formation of urine?​</h3>

​Answer : A.) Pressure causes water and dissolved substances to filter through capillary walls of the glomerulus.

Hope this helps!​​​​​

​\textit{\textbf{Spymore}}​​​​​​

5 0
3 years ago
Read 2 more answers
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