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Otrada [13]
4 years ago
15

Helper t cells are activated by ________ on ___________ cells

Biology
1 answer:
inessss [21]4 years ago
5 0
Helper T cells become activated by interacting with antigen presenting cells. and the second blank space is either cytotoxic t cells or B cells
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Explanation: Life would not be possible because we would have no oxygen. We breath out  carbon and plants breath out oxygen.so plants would die and then we would die.

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What is reflex movements
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Scientific research about the carbon cycle and global warming would be most valuable if the results
GarryVolchara [31]

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if the results are efficient in answering the problems raised in the research and if they manage to come to terms with the hypotheses.

Explanation:

As you may know, scientific research must be done through several steps that allow an experiment to be carried out in order to reach conclusions on a certain topic.

In research on the carbon cycle and global warming, it is necessary for the researcher to raise problems and questions about this topic, as well as to raise hypotheses that must be directly related to the results of the experiment. If the result of the experiment is efficient in answering the research problems and questions, in addition to being able to agree with the presented hypotheses, it means that the research has value within the scientific branch in which it fits, in addition to showing that the experiment was done correctly.

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3 years ago
14. During abrasion, glaciers wear away Earths surface by dragging embedded rocks. Which of the following actions is most simila
igomit [66]

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I think it is B

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