Luteinizing hormone (lh) and follicle-stimulating hormone (fsh) are
a.
only produced in female humans.
b.
produced in the testes.
c.
constantly secreted into the bloodstream of males.
d.
produced in the ovaries.
e.
produced in both male and female humans.

Competition occurs between species when

Which best explains how a heat pump can heat a room? cold air from the house is moved through pipes, where it absorbs thermal energy. warm air from outside is pushed into the house to replace the cold air. combustion warms the air when chemical energy is transferred to thermal energy. fuel is used to move a piston, which pushes warm air into the house.

What's wrong with this ecological pyramid? (multiple choice)1. secondary consumers should be at the bottom of the pyramid2. the sun has an arrow leading to decomposers 3. primary consumers should come after the sun4. energy retained should increase from the bottom to the top5. the sun should be at the bottom of the pyramid