What produces spores that develop into gametophytes?
Options:
- (A) fungi
- (B) cacti
- (C) plants
- (D) ferns
- (E) Orchids
- (F) PDAs
- (G) barnacles
- (H) bushes
--
Let's think first: Flowers produce spores that develop into gametophytes. Another interesting flower is the Orchid flower. Orchids produce spores that develop into gametophytes.... So the answer is [(E)]


What animal can regrow middle segments when broken?
Options:
- (A) amoeba
- (B) geckos
- (C) humans
- (D) insects
- (E) Wasps
- (F) worms
- (G) toads
- (H) snakes
--
Let's think first: Annelids have the amazing capacity to regrow segments that break off. Annelids include earthworms and leeches. Earthworms have the ability to regrow segments that break off.... So the answer is [(F)]


_ allow water to penetrate the soil.
Options:
- (A) crawfish burrows
- (B) major threat to health
- (C) Deposition
- (D) bending light rays
- (E) earthworm homes
- (F) Exfoliation
- (G) termite burrows
- (H) Earthworm burrows
--
Let's think first: Earthworm burrows help aerate soil, which is also good for plants. Aeration breaks up the soil and allows water to penetrate. Earthworm burrows allow water to penetrate the soil, which is good for plants.... So the answer is [(H)]


Which of the following does not have an anterior and posterior end?
Options:
- (A) Adult mammals
- (B) Adult reptiles
- (C) Adult birds
- (D) Adult echinoderms
- (E) Earth orbiting the Sun
- (F) an erupting volcano
- (G) peachleaf willow
- (H) sensory neurons
--
Let's think first: Adult echinoderms have radial symmetry. Animals with radial symmetry lack an anterior and posterior end. Adult echinoderms lack an anterior and posterior end.... So the answer is [(D)]


What is part of the kidney structure?
Options:
- (A) thorax
- (B) glomerulus
- (C) organ
- (D) arteries
- (E) layers of fat
- (F) more abundant
- (G) pancreas
- (H) urine
--
Let's think first: Nephrons are the structural and functional units of the kidneys. Each nephron has a glomerulus. Glomerulus is part of the kidney structure.... So the answer is [(B)]


What forms when molecules react with one another?
Options:
- (A) biochemistry
- (B) Chemical energy
- (C) Energy.
- (D) atoms
- (E) chemical bonds
- (F) elements
- (G) flow of electrons
- (H) Organic compounds
--

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Let's think first: Chemical bonds form when substances react with one another. All substances are composed of molecules. Chemical bonds form when molecules react with one another.... So the answer is [(E)]