Based on the graph, at what span of time was the birthrate higher than the

2. While looking at a cell under a microscope, a scientist is able to see a biological molecule. This molecule is a nucleic acid

I am Lyosha [343]

The correct answer is A

The scientist can determine that this nucleic acid is a DNA molecule, because it contains Thymine, which does not occure in the RNA molecule. The RNA molecule contains Adenine, Guanine and Cytosine just like the DNA, but unlike the DNA it contains Uracil, not Thymine.

Secondly, the scientist can say with certainty that this DNA molecule is surrounded by a nucleus based on the structure of the nucleic acid described. Only eukaryotic cells have ladder structure. The prokaryotic cells have circular DNA and do not have any organelles, like the nucleus. Therefore, from the ladder structure of the DNA the scientist can see that the cell has a nucleus.

8 0

3 years ago

Read 2 more answers

1. How did dark matter affect the development of structures in the early universe?

-Dominant- [34]

Answer:

1. It seeded the development of galaxies

2. The percentage of dark matter has shrunk in scientists' estimates since the 1980s

The percentage of unknown material has grown in scientists' estimates since the 1970%

3. Supernovae that are moving away at an accelerating rate.

Explanation:

1. How did dark matter affect the development of structures in the early universe?

It seeded the development of galaxies.

It seeded the development of quasars.

It cooled pockets of gas to form nebulae.

it became part of black holes

2. How has scientific understanding about the composition of the universe changed over time? Select the two correct answers.

The percentage of dark matter has shrunk in scientists' estimates since the 1980s

The percentage of unknown material has grown in scientists' estimates since the 1970%

The percentage of ordinary matter has grown in scientists' estimates.

The percentage of dark energy has shrunk in scientists estimates

3. Which is evidence for the existence of dark energy?

Pulsars that seem to be moving closer at an accelerating rate.

Supernovae that are moving away at an accelerating rate.

Black holes that are expanding at a constant rate.

Galaxies that are rotating at a constant rate.

<u><em>Please don't use these answer's to cheat they are to help only.</em></u>

6 0

3 years ago

Which factor can affect the rate of photosynthesis by denaturing enzymes in the plant?

stiv31 [10]

The answer is low light intensity! I hope this helps!

6 0

3 years ago

What enzyme does the square represent? *

lakkis [162]

Answer:chemical reaction

Explanation:Enzymes are biological molecules (typically proteins) that significantly speed up the rate of virtually all of the chemical reactions that take place within cells. They are vital for life and serve a wide range of important functions in the body, such as aiding in digestion and metabolism.

3 0

4 years ago

An organism that lives in environmental conditions so extreme that few other species can survive there are ________.

asambeis [7]

Answer: extremophiles

Explanation:

Extremophiles are living organisms that are adapted to survive extreme environmental conditions such as high pH, high temperatures or high pressure.

Examples of extremophiles include many Prokaryotes like bacteria and cyanobacteria, as they can be found in volcanic areas.

3 0

4 years ago