S4. Which of the following land? was NOT a key adaptation a. internal fertilizat
ID: 272859 • Letter: S
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S4. Which of the following land? was NOT a key adaptation a. internal fertilization of vertebrates that allowed them to colonie vertebrates b. amniote egg c. jointed fins/limbs d. open circulatory system 55. Which of the following is characteristic of deuterostomes a. incomplete cleavage b. two germ layers, the ectoderm and endoderm c. A blastopore that becomes the anus d. gastrovascular cavity e. acoelomate with respect to body cavities 56. In an open circulatory system, a. there is no heart. b. there is a gastrovascular cavity c. there are no blood vessels. d. blood flows into the digestive cavity and mixes with food. e. there is no distinction between blood and tissue fhuid 57. Insect blood does not carry oxygen because a. oxygen is not soluble in insect blood b. oxygen is delivered to tissues directly from the atmosphere c. carbon dioxide displaces it on hemoglobin d. insects use nitrous oxide as a source of oxygen e. an open circulatory system cannot deliver oxygen to tissues 58. Metamorphosis has evolved numerous times in various species because a. diets must change with seasonal changes b. it is reproductively efficient to have body plans specialized for either growth or gamete production. c. camouflage is a good way to avoid predators d. it is easier to defend territories e. mimicry is more efficient when alternate generations are involved. 59. Cross-pollination in plants is encouraged by all of the following mechanisms except which one? a. self-incompatibility genes. b. dioecious species c. production of pollen and eggs at different times. d. petals enclosing the stamens with the pistils in the same flower. e. separation of stamens and pistils among different flowers a. complex leaves that can photosynthesize at a faster rate than nonseed-producing plants can. b. spores with food reserves for the young sporophyte. c. seeds with a dormant stage that can remain viable for many years d. gametes e. dominance of the gametophyte generation 60. One reason for the enormous evolutionary success of seed plants is their possession ofExplanation / Answer
54. d open circulatory system
55. c
56. c there are no blood vessels
57. b oxygen is delivered to tissues directly from the atmosphere
58. b
59. b
60. b
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