What increases the productivity and stability of ecosystems?
Options:
- (A) Fully cooking the oysters
- (B) genetic uniformity
- (C) genetic diversity
- (D) extinction
- (E) agriculture
- (F) disease
- (G) Earth orbiting the Sun
- (H) recycling
--
Let's think first: Biodiversity increases the productivity and stability of ecosystems. Biodiversity is basically genetic diversity. Genetic diversity increases the productivity and stability of ecosystems.... So the answer is [(C)]

What occurs with the stopping of menses?
Options:
- (A) puberty
- (B) illness
- (C) period
- (D) menopause
- (E) sweating
- (F) acetic acid
- (G) Dehydration
- (H) adulthood
--
Let's think first: Menopause occurs when menstruation stops occurring, usually in middle adulthood. White bryony is used for suppressed menses, menstruation too early and too profuse. Menopause occurs when menses stop occurring, usually in middle adulthood.... So the answer is [(D)]

What produces both eggs and sperm?
Options:
- (A) Plant reproduction
- (B) sub-units of species
- (C) gastropod shells
- (D) an individual mature sponge
- (E) Microscopic organisms
- (F) members of their own species
- (G) peachleaf willow
- (H) seed dispersal
--
Let's think first: Adult sponges produce eggs and sperm. An adult is mature, fully developed. Mature sponges produce eggs and sperm.... So the answer is [(D)]

Animals that tend to have complex nervous systems are missing what?
Options:
- (A) Energy
- (B) Energy.
- (C) nervous system
- (D) Chlorophyll
- (E) backbone
- (F) alleles
- (G) abdomen
- (H) brain
--
Let's think first: Most invertebrates have a more complex nervous system. Invertebrates are animals without a backbone. Most animals without a backbone have a more complex nervous system.... So the answer is [(E)]

What do arteries carry in the body?
Options:
- (A) solids
- (B) antimatter
- (C) glucose
- (D) gases
- (E) Air
- (F) expelled
- (G) liquid
- (H) oxygen
--
Let's think first: Arteries generally carry oxygen-rich blood. Blood is a liquid organ. Arteries carry oxygen rich liquid.... So the answer is [(G)]

What happens when cell walls relax?
Options:
- (A) evaporation
- (B) permineralization
- (C) preventing heat transfer
- (D) allow growth
- (E) it keeps an organism warm
- (F) air cools
- (G) Cell walls expand
- (H) heat produced
--
Let's think first: Dilation occurs when cell walls relax. Blood flow is improved by vitamin E and it causes blood vessels to dilate or expand. When cell walls relax, they expand.... So the answer is [(G)]