What type of antibodies will a person with type A blood have?

A) anti-A only
B) anti-B only
C) anti-O only
D) anti-A and anti-B
E) The type will vary with each individual.

Which structure is not involved in a spinal reflex?

A) spinal cord
B) brain
C) sensory neuron
D) motor neuron
E) gray matter

Archaea have molecules with reactive side chains in their plasma membrane, so the tails of archaeal phospholipids form covalent bonds with one another. As a result, the plasma membrane is ____.

A) more hydrophobic
B) less rigid
C) less fluid
D) more fragile
E) easily disturbed

A long day plant will flower when exposed to short nights.

Which of these classification categories contains the most closely related group of organisms?

A) domain
B) genus
C) family
D) phylum
E) kingdom