Without the presence of sea otters, sea urchins would otherwise overgraze kelp beds, dramatically changing the marine community of which the urchins and otters are a part. for this reason, sea otters are considered what?

Why do plants need the element nitrogen

Due to an unusually high concentration of particles inside the cell the memebrane starts to expand and burst which problem is the cell most likely having?

What is the main purpose of the organ system?

A secondary plant compound might be used for which of the following? a new crop variety a new drug a soil nutrient a crop pest

Which of the following statements is true of a rocky shore ecosystem? Select all that apply. A Animals in the middle and low tide zones can only feed during high low tide. B Filter feeders are common. C Deposit feeders are rare.

When you get a minor cut platelets in your blood stick to the wound and cause?

Why are phospholipids ideal for making up the selectively permeable membrane?

5. What type of bond can be found between complementary nitrogenous bases?

Which field of biology focuses on heredity and dna?

What property of water was demonstrated by fold and float