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Nuetrik [128]
2 years ago
13

Polar bears and grizzly bears share a common ancestor (similar to you and your cousin sharing a grandparent); Describe some sele

ctive pressures that may have caused speciation between these two types of bears.
Biology
1 answer:
Natali5045456 [20]2 years ago
7 0
Lasting genetic similarities make the two bears biological sister species, more closely related to one another than to any others. ... But Ursus maritimus has also evolved to match its polar environment, growing a longer snout than brown bears' and larger, paddle-like paws, both of which aid polar bears in hunting seals.
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5. A logging company cut down all the large spruce trees in an area of forest. After the area was cleared, spruce seedlings bega
andrew-mc [135]

The missing part of the question is -

" Is this Primary or Secondary Succession?"

Answer:

The correct answer is - secondary succession.

Explanation:

Recolonization of the plant and animals to habitat after a major disturbance such as flood, lava eruption, wildfire, or human disturbance is characterized as secondary succession.

In this particular case, there is secondary succession occurs, there is man-made disturbance tajes place as logging company clear the spruce trees from a habitat, and after clearing the land the spruce seedlings began to sprout, birds, rabbits recolonize to the area.

3 0
2 years ago
What do all codes, such as Morse code and Braille, have in common?
Ksju [112]
They’re all trying to tell people something
6 0
2 years ago
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A biologist ground up some plant leaf cells and then centrifuged the mixture to fractionate the organelles. Organelles in one of
Zigmanuir [339]

Answer:

Chloroplast and mitochondria

Explanation:

Chloroplasts are organelles present only in plant cells and algae in regions that become illuminated. They are green in color due to the presence of chlorophyll and are responsible for photosynthesis. Chloroplasts produce ATP in the presence of sunlight and therefore the heaviest fractions should contain these organelles.

Mitochondria are cellular organelles related to the process of cellular respiration. They are often referred to as “powerhouses” of cells because, through the cellular respiration process, a large amount of ATP is generated. Mitochondria do not need light to produce ATP, so it is likely that these organelles are present in the lightest fractions.

6 0
2 years ago
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A protein's alpha helices and beta sheets fold together to create an overall shape at the _____ level of protein structure.
bogdanovich [222]
Tertiary structure :))))
3 0
2 years ago
The tiles below depict translation events during roughly two cycles of elongation. each cycle adds a leucine (leu) amino acid to
sergij07 [2.7K]
I found the attached image on the internet and I believe it has the tiles referred to on the question.
As we can see on the image, the A-site, P-site, and E-site are represented. The A-site is occupied by the tRNA linked to the growing peptide chain. The P-site is the one occupied by the tRNA that works accepting the growing protein for peptide bond formation.
Firstly, the protein is formed, it is the first tile from the left.
Then, the first tile from the right is where the Leu is formed.
On the second tile from the right the Leu is then added to the protein.
The process is then repeated again as there are two cycles of elongation adding a Leu in each of them: third tile from the right, third tile from the left, second tile from the left.

7 0
2 years ago
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