Ques:[Prokaryotes lack regions that do not code for proteins, while this type of living being has them:
Options:
- (A) bioaerosols
- (B) layers of fat
- (C) orchids
- (D) animals
- (E) critical organs
- (F) sensory neurons
- (G) eukaryotes
- (H) it needs them]
Ans:[Introns are regions that do not code for proteins. Prokaryotes lack introns, whereas eukaryotes contain introns. Prokaryotes lack regions that do not code for proteins, while eukaryotes do have them.
(G)]

Ques:[Thyroid hormones increase the rate of
Options:
- (A) by making heat
- (B) the rest of the body
- (C) female sex cells
- (D) Helps them grow
- (E) hydration of their cells
- (F) heat produced
- (G) converting food to energy
- (H) aerobic capacity]
Ans:[Thyroid hormones increase the rate of metabolism in cells throughout the body. Metabolism is the process of converting food to energy. Thyroid hormones increase the rate of converting food to energy.
(G)]

Ques:[Arthropods have a life cycle with what?
Options:
- (A) rapid expansion
- (B) survival
- (C) aerobic capacity
- (D) food and shelter
- (E) an organism's body
- (F) reproduce
- (G) barnacles
- (H) mixing genes up]
Ans:[Arthropods have a life cycle with sexual reproduction. Sexual reproduction mixes the genes up more than is possible with asexual reproduction. Arthropods have a life cycle with mixing genes up.
(H)]

Ques:[How do ost frogs breathe as tadpoles?
Options:
- (A) gills
- (B) sucking in air
- (C) oxygen
- (D) lungs
- (E) ligt
- (F) nektar
- (G) skin
- (H) ovaries]
Ans:
[Most amphibians breathe with gills as larvae and with lungs as adults. Frogs are the most durable of the amphibians. Most frogs breathe with gills as larvae and with lungs as adults.
(A)]