When mendel allowed the tall f1 pea plants(tt) to self-pollinate,
a. the offspring were of medium height
b. all of the offspring were tall
c. all of the offspring were short
d. some of the offspring were short

the unequal cytoplasmic division that  results  in  one egg  and three polar bodies ensures that a fertilized  egg has  ample nutrients  forits journey  to  the uterus.

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answer: collecting information/data

reason: the student is going around and asking people questions to collect data

i hope this

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.