1. b. the body eliminates ammonia through urine production
a. Organisms that gain energy from food they eat are called heterotrophs. Organisms that use energy from the sun to create food, which they get energy from, are called autotrophs
b. the body eliminates ammonia through urine production
c. most plants have either seeds or spores that become planted in the soil and germinate into seedlings

2. e. plants use the sun to make carbohydrates
d. the cell membrane is semi-permeable and allows certain particles to pass through, but not others
e. plants use the sun to make carbohydrates
f. endothermic animals have blood circulating through their body using arteries and veins

3. g. hormones and nerve impulses are chemicals that help keep an organisms body processes in balance
h. butterflies go through complete metamorphosis to mature from egg to caterpillar to cocoon to butterfly
i. gymnosperms have both male and female cones on the same tree which combine to produce the next generation

4. j. converting glucose into usable energy in the mitochondria of the cell
k. exothermic animals like snakes and lizards must bask in the sun to maintain their body temperature
l. Worms get rid of nitrogenous waste (like our urine) through structures called nephridia

5. m. Terrestrial organisms use internal fertilization
m. Terrestrial organisms use internal fertilization. The male inserts the sperm into the female’s body.
n. Insects have COMPOUND EYES, antennae, sensory hairs, and PHEROMONES (chemicals used by species to communicate with each other) to obtain information from their environment.