What is a pheromone?

Choose the best answer. All living things are: a) evolving b) made of stuff c) made of cells d) unrelated

Which best explains why viruses do not have special structures or enzymes that allow them to make their own food? Viruses can use energy in living cells that they infect. Viruses can replicate inside a host that they infect.

Name one endocrine hormone and state one effect of oversecretion and undersecretion

Which form of cell transport allows small molecules to move from an area of higher concentration to an area of lower concentration without energy being required from the cell? A. osmosis B. pinocytosis C. phagocytosis D. simple diffusion

Consider a field plot containing 200 kg of plant material. Approximately how many kg of carnivore production can be supported? A) 200 B) 100 C) 20 D) 10 E) 2

Which characteristic is not useful in the classification of igneous rocks?

Normal urine is usually pale yellow to amber in color, due to the presence of

Fastest neurons can send impulses at miles per hour

In order for an organism to survive, it must do what? A. stay healthy B. reproduce C. regenerate D. select a habitat

Which would be hotter in the northern hemisphere, sunny day or cloudy day in July? Explain.