Whelks are a type of sea snail. They have spiral shells and grow using their mantle to produce calcium carbonate. They are most likely

A

sponges.

B

mollusks.

C

cnidarians.

D

arthropods.

If a person with type B blood needs a transfusion, which blood types can the person safely receive? Explain your answer.

How many moles of MgCl2 are there in 321 g of the compound?

Stream pools are more similar to ponds than lakes are. True or False?

What units would you use to measure a virus (manometers, micrometers, or millimeters?) What units would you use to measure a red blood cell (manometers, micrometers, or millimeters?)

What does "standing jefferson on his head" have to do with the populist platform?

Usually flowers contain more stamens than pistil. Why?

Choose all the answers that apply. Water: 1. can dissolve most substances 2. has a strong attraction to itself 3. is neither acidic nor basic 4. contracts when it freezes 5. heats up and cools down more quickly than land

A seismic station recorded the P-wave, but no S-waves, from an earthquake because S-waves were what?

In vertebrates, what joins the brain to the rest of the body? A. spinal cord B. medulla oblongata C. peripheral nervous system D. vertebral column

Flagship species are often the focus of successful conservation efforts. What are the advantages and disadvantages of this approach to biodiversity conservation? Do you think the advantages outweigh the disadvantages?