Which of these is true about how often tides occur? A. All tides occur once a week.
B. Tides have no pattern.
C. High tides and low tides occur twice a month, and spring tides and neap tides occur twice a year.
D. High tides and low tides occur twice a day, and neap tides and spring tides occur twice a month.

Hurry 25pts which one of these is involved in both sexual and asexual reproduction a sperm b spores c seeds d eggs

Many animals cannot sweat to maintain a stable body temperature. what is one other way animals can cool down?

What is the significance of the protein-lined pits? a. protein attracts other proteins needed for atp synthesis within the cell. b. protein-lined pits are able to transport one molecule at a time down the concentration gradient within the cell. c. the polarity of proteins allows other polar molecules to attach and be transported in the cell by transport channels. d. receptors within the pits allow ligands to fuse and be transported into the cell by endocytosis.