How do proteins leave the er?
Options:
- (A) aqueous solution
- (B) it's state
- (C) Veins and arteries.
- (D) Move to another area
- (E) allow growth
- (F) active transport
- (G) It expands
- (H) movement
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Let's think first: Vesicle transport requires energy, so it is also a form of active transport. Proteins leave the ER in transport vesicles 5. Proteins leave the ER via active transport.... So the answer is [(F)]

What happens when muscular walls of arteries and veins contract?
Options:
- (A) connection
- (B) It expands
- (C) Dehydration
- (D) construction
- (E) forces
- (F) massive damage
- (G) constriction
- (H) contraction
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Let's think first: Constriction occurs when the muscular walls of blood vessels contract. Arteries and veins are blood vessels. Constriction happens when the muscular walls of arteries and veins contract.... So the answer is [(G)]

In flowers, where do female gametophytes produce eggs?
Options:
- (A) fruit
- (B) ferns
- (C) plants
- (D) embryos
- (E) edible
- (F) seeds
- (G) bushes
- (H) orchids
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Let's think first: Female gametophytes produce eggs inside the ovaries of flowers. Fruits develop from the ovary of the flower. Female gametophytes produce eggs inside the fruit of flowers.... So the answer is [(A)]

What process provides one substance transported by the blood?
Options:
- (A) breathing
- (B) heat produced
- (C) drink
- (D) complex
- (E) osmosis
- (F) sweating
- (G) cell division
- (H) condensation
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Let's think first: Oxygen is just one substance transported by the blood. Breathing and circulation allow oxygen to be transported to the body's cells. Breathing provides one substance transported by the blood.... So the answer is [(A)]

Oxygen is essential for cellular respiration for what?
Options:
- (A) Man
- (B) Energy.
- (C) humans
- (D) plants
- (E) animals
- (F) Energy
- (G) health
- (H) fungi
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Let's think first: Oxygen is essential for cellular respiration for all aerobic organisms. Fungi are aerobic organisms. Oxygen is essential for cellular respiration for fungi.... So the answer is [(H)]

What do all vertebrates have?
Options:
- (A) sensory neurons
- (B) characteristics
- (C) a complete digestive system
- (D) Veins and arteries.
- (E) sub-units of species
- (F) wings and feathers
- (G) gills
- (H) gizzard
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Let's think first: Chordates have a complete digestive system and a closed circulatory system. All chordates are vertebrates. Vertebrates have a complete digestive system and a closed circulatory system.... So the answer is [(C)]