Tip cells are polarized and extend numerous filopodia to guide sprout migration via
a. semaphorins
b. ephrins
c. integrins
d. all of the above
Ans: d. all of the above
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Pathogens that are transmitted via the fecal-oral route are the most common type of pathogens that infect drinking water
Indicate whether the statement is true or false.
In the biology lab, you are shown petri dishes of cheek cell cultures. One set of cells is thin, with individual cells arranged in a single, orderly layer. The other culture shows irregular crowding of cells. The crowding cells are likely cancer cells, showing an absence of
A. telomerases. B. All of the answer choices are correct. C. oncogenes. D. contact inhibition. E. angiogenesis.
Why are pea plants (Pisum sativum) a good species for genetics studies?
A. They have many distinctly identifiable forms of genetic traits.
B. They can be self-fertilized for true-breeding genetic traits.
C. They produce large numbers of offspring (the peas).
D. All of the answer choices are correct.
E. Growth of pea plants is simple and easy.
Which term describes the directed growth of plants in response to light?
a) Photosynthesis b) Active transport c) Transpiration d) Phototropism