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liraira [26]
2 years ago
15

13. Which discovery did not contribute to cell theory?

Biology
1 answer:
Rasek [7]2 years ago
4 0

Credit for developing cell theory is usually given to two scientists: Theodore Schwann and Matthias Jacob Schneider. While Rudolf Virchow contributed to the theory, he is not as credited for his attributions toward it.

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Science fusion grade 7 lesson 1 review
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7 0
3 years ago
Plant molecular biologists have recently discovered genes that are responsible for controlling cell division in tomatoes. Why wo
goldfiish [28.3K]

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5 0
2 years ago
Which statements describe functions of antibodies? Select two options.
vodomira [7]

Answer:

This question lacks options, options are:

A.They maintain the cell’s shape.

B.They regulate cell processes.

C.They protect the body from infectious agents.

D.They signal the immune system to destroy pathogens.

E.They speed up biochemical reactions.

F.They send electrical signals.

The correct answers are C and D.

Explanation:

B cells and T cells use different biological weapons to attack the pathogen. The first secrete proteins called antibodies, which are distributed via the blood or the exposed surfaces to the environment, such as mucous. Antibodies are glycoproteins that circulate in the bloodstream looking for antigens that cause some type of damage to the body. Antibodies recognize and neutralize pathogens in a highly efficient way. Once the antibodies are produced, they remain circulating in the bloodstream for several months, which generates immunity for a long period of time to a certain antigen, in other words, they are capable of recognizing other molecules (antigens) in a very specific way and forming stable complexes with them (immune complexes). Its appearance in plasma is part of the adaptive immune response, in what is known as a specific humoral response, constituting a very effective defense against pathogens.

3 0
2 years ago
The vaccine for chickenpox is: select one:
Alexxandr [17]
C. alive. The vaccine contains a live strain of varicella-zoster (chicken pox) virus which has been attenuated so that it will stimulates the immune system but does not cause any disease in healthy people.
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