Answer:
Enzymes create/speed up chemical reactions, along with many other very important tasks.
Answer:an airway leading from the nose to the treachea.
Explanation:
I'm not really sure what this question is about - is it a true or false question? If so, then the answer is true - given that there are fewer bamboo plants in the world (because they cannot grow as fast as pandas can eat them), there won't be enough food for pandas to thrive, and thus they won't survive for much longer.
If you just need to write the words necessary to complete the sentence, then 'on which,' 'is now scarce,' 'about,' and 'their' are the correct answers.
Answer: C
Explanation: Water is a polar molecule because the electrons of the hydrogen atoms get "pulled" towards the electrons of the oxygen atom. Which is both positive and negative on opposite ends.
It could be B as well but, I believe it's C
Answer:
In a primary immune response, naive B cells are stimulated by antigen, become activated, and differentiate into antibody-secreting cells that produce antibodies specific for the eliciting antigen.
A secondary immune response is elicited when the same antigen stimulates memory B cells, leading to the production of greater quantities of specific antibodies that are produced in the primary response