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stiks02 [169]
2 years ago
9

Which event contributed to life evolving on Earth ​

Biology
1 answer:
Helen [10]2 years ago
3 0

Answer:natural selection

Explanation:

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A generalized swelling of an arm or a leg that occurs after surgical removal of a chain of lymph nodes is known as
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This condition is known as lymphadema. After surgical removal of chain lymph nodes has occurred, the excess of lymph fluids in the lymph vessels might not find its way to the bloodstream as a result of being blocked or other reasons, and hence localized swelling in that area occurs as a result of addition of the fluids. In most cases, lymphadema affects only a single arm or leg, and is commonly brought on by cancer treatment that involves damging or removing lymph nodes.
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3 years ago
Which of the following best describes how a blood cell and skin cell have the exact same DNA sequence and yet look different and
den301095 [7]

Answer:

This question is incomplete as it lacks options, however, it will be answered BROADLY so the it can be understood enough to select the correct answer.

Please find the explanation below

Explanation:

Cells perform different functions and look differently because of the process of CELL DIFFERENTIATION. All cells arise from a single stem cell, which then gradually differentiates into different types of cells with different functions, as they divide.

At the molecular level, these different types of cells contain the same DNA sequence as rightly stated in the question. However, they look and perform differently because some of the genes are turned on while the others are turned off via the process of GENE EXPRESSION.

Therefore, a blood cell and skin cell possess exactly the same DNA sequence but look different and perform different functions because of CELL DIFFERENTIATION in which some genes on the DNA sequence are expressed and others are repressed. For example, in the blood cell; the genes coding for certain proteins found in blood are expressed while every other gene is silenced or inhibited. This allows those cells to perform only blood-related functions.

3 0
3 years ago
What makes up an atom?​
Delicious77 [7]
Neutrons protons and electrons
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3 years ago
True or false: single sugars are too large to be absorbed directly into the bloodstream
AleksandrR [38]

Answer:

False

Explanation:

The sugars on the basis of the number of glucose or sugar units can be categorized into two categories:

1. Simple sugars: The sugars which contain one or two sugar units called mono and disaccharides.

2. Complex sugars: The sugars which contain more than two sugar units are complex sugars.

The simple sugars like glucose, galactose are easily digested by the digestive system of the human body and easily absorbed by the cells.

Since the simple sugars or simple sugars are small in their structure compared to the complex carbohydrates therefore false is the correct answer.

6 0
3 years ago
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In dividing cells, most of the cell's growth occurs during “_____”
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In dividing cells, most of the cell's growth occurs during interphase. 5. The mitotic spindle(s) is a cell structure consisting of microtubules, which forms during early mitosis and plays a role in cell division.

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2 years ago
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