How do root cell membranes allow osmosis. A. a reflex triggers the need for water in the plant.
B. They keep water out of the plant
C. They are impermeable
D. They are semi permeable

The diagram shows the development of the oocyte and the follicle during the menstrual cycle. identify at which stage in the cycle the hormone levels are at their highest and most active.

Me.henley said, “in the rat race we call life, only the strong will survive.” he may have been referring to

What is the purpose of transcription? a. to copy the nucleotide in dna b. to form rna molecules from dna c. to produce a nucleic acid sequence from an amino acid sequence d. to link amino acids together to form stands of protein