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Elanso [62]
2 years ago
15

Which of the following statements is true?

Biology
1 answer:
Dimas [21]2 years ago
5 0

Answer:

B. The periplasmic space contains the peptidoglycan layer of Gram-negative bacteria.

Explanation:

Periplasma is the compartment that surrounds the cytoplasm in Gram negative bacteria. It is comprised between the plasma membrane (which is inward) and the outer membrane of the gram negative, on the outside.

This periplasmic space contains the peptidoglycan layer and proteins that are responsible for receiving extracellular signals, among other functions.

The high concentration of peptidoglycan causes this space to be in a gel-like state.

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Which terms describe the different movements of Earth? Select three options.
AlexFokin [52]

Answer:

rotation

revolution

lunar cycle

Explanation:

hope that helps if so please mark as brainliest

4 0
3 years ago
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Describe where on earth you think air pressure would be greatest<br> HELPPPPPPP SOMEONEEE
Alex787 [66]

Answer:

The depth (distance from top to bottom) of the atmosphere is greatest at sea level and decreases at higher altitudes. With greater depth of the atmosphere, more air is pressing down from above. Therefore, air pressure is greatest at sea level and falls with increasing altitude

Explanation:

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3 0
3 years ago
Suppose you were in charge of sending an unmanned space probe to a new planet in search of life. The probe would be able to coll
Svetlanka [38]

Answer:

Option D, a test for the presence of cells that contain DNA

Explanation:

As we know all living organisms are made up of cells and DNA is the basic genetic material that codes for protein and traits with an organism. If even a single cell with DNA is detected on the extraterrestrial planet then it will be clear that it has life on it or the environmental conditions are favorable to support life. Cells are microscopic and hence can be seen through microscope which can be installed easily on a probe.

Hence, option D is correct

8 0
3 years ago
_______ cause(s) populations to change over time.
vekshin1
The answer is B., Natural Selection.

Weather certainly doesn't change populations, and genes only caused individuals in a population to be slightly ( genetically-wise ) different from the others. It does cause change, but not change in the whole population over time.
Natural disasters don't change the populations over time either. Natural disasters only caused change in their environment, at most.

So, the only answer left is natural selection, and it makes sense too! 
Natural selection is the process where the individuals with better traits suited to survive in that specific environment live on and give those good traits to their offspring.
The individuals with less suited traits to survive will die out, and will not be given an opportunity to reproduce and pass on their less suited traits, so over time, the population will increase of individuals with better suited traits to survive and the individuals with less suited traits will eventually die out, therefore making the entire population change.

Hope I helped you!
3 0
3 years ago
What element do all the organic compounds contain?
Jlenok [28]

ALL organic compounds ALWAYS contain carbon!!

4 0
3 years ago
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