Courtship is a behavior that animals use to attract what?
Options:
- (A) a pollinator
- (B) a partner
- (C) animals
- (D) a child
- (E) honeybees
- (F) humans
- (G) reproduce
- (H) a host
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Let's think first: Courtship is behavior that is intended to attract a mate. Mating Ducks usually look for a mate or partner in winter. Courtship is behavior that is intended to attract a partner.... So the answer is [(B)]


What does pollen consist of tiny grains of?
Options:
- (A) it helps plants in growing
- (B) the female sexual organs
- (C) Something with exactly eight protons
- (D) seeds
- (E) Microscopic organisms
- (F) the male sex cells of plants
- (G) bees
- (H) sub-units of species
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Let's think first: Pollen consists of tiny grains that are the male gametes of plants. Animals that reproduce sexually produce sex cells, or gametes. Pollen consists of tiny grains that are the male sex cells of plants.... So the answer is [(F)]


What is under the same family as worms?
Options:
- (A) animals
- (B) parasites
- (C) bacteria
- (D) eels
- (E) ant
- (F) leeches
- (G) snakes
- (H) infected
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Let's think first: Annelids are worms such as the familiar earthworm. Annelids include earthworms and leeches. Leeches are related to worms.... So the answer is [(F)]


Hydrogen bonds cause what to expand when it freezes?
Options:
- (A) salt
- (B) mercury
- (C) NaCl
- (D) lake
- (E) H20
- (F) rain
- (G) h2o
- (H) oxygen
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Let's think first: Hydrogen bonds cause water to expand when it freezes. Water is everywhere H20. Hydrogen bonds cause H20 to expand when it freezes.... So the answer is [(E)]


The mature form of what kind of cell secretes antibodies?
Options:
- (A) more abundant
- (B) it needs them
- (C) positive
- (D) graptolites
- (E) A Greek letter
- (F) barnacles
- (G) B-lymphocytes
- (H) homogenous
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Let's think first: Plasma cells are activated B cells that secrete antibodies. Plasma Cells Plasma Cells Plasma cells are the mature form of B-lymphocytes. Mature forms of B-lymphocytes secrete antibodies.... So the answer is [(G)]


Pacinian corpuscles are found mainly in the _.
Options:
- (A) tumor
- (B) pupils
- (C) muscle
- (D) hair
- (E) skin
- (F) Man
- (G) retina
- (H) Summer
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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: Pressure receptors are found mainly in the skin. Pacinian corpuscles are pressure receptors. Pacinian corpuscles are found mainly in the skin.... So the answer is [(E)]