What does a Euglena require to exhibit phototactic behavior? A.
a contractile vacuole

B.
cilia

C.
an eyespot

D.
a pseudopod

Dna has unique properties that allow it to accurately retain genetic information, even after multiple rounds of replication. one aspect of dna that allows it to accurately store genetic information is the base pairing from chargaff\'s first rule of the four nucleotide bases. if the c content of a dna molecule is 22%, what are the percentages of the remaining bases?

Which of these best describes what occurs during cytokinesis? a) the chromosomes are separated b) the cell begins to divide by replicating the chromosomes c) the cytoplasm is divided between the two new daughter cells d) the nucleus opens to allow the chromosomes to enter the cytoplasm

Guard cells control which event? the growth of plants capture of solar energy gas exchange in leaves water absorption in roots