Which of the following statements about pinecones
is true?
a. Cones are exclusively female structures.
b. Cones are the result of pollination.
c. One type of cone produces microspores.
d. Pollen grains are retained within male cones.
e. Microspores develop into female
gametophytes within the ovule.
Answer: c
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Answer the following statement true (T) or false (F)
The bodies of arthropods are supported mainly by
a. an exoskeleton. b. only nonskeletal structures. c. a hydrostatic skeleton. d. an endoskeleton. e. joined exo- and endoskeletons.
Which of the following statements about the role of fire in biomes / ecosystems is true?
A) Forest fires did not occur in the times before human settlement. B) Fires decrease the number of animal communities in ecosystems by destroying habitat. C) Forest fires are extremely destructive to ecosystems and should be put out as quickly as possible. D) Fire is essential to maintaining some ecosystems. E) Fire is not an important factor in developing and maintaining ecosystems.
Put the terms in the correct order from the heart to the body and back to the heart.
A. venules ? arterioles ? capillaries ? veins ? arteries B. veins ? venules ? capillaries ? veins ? arteries C. arteries ? arterioles ? capillaries ? venules ? veins D. arteries ? venules ? veins ? arterioles ? capillaries