24) Which of these mollusk features substitutes for the coelom by providing a sp

Question

24) Which of these mollusk features substitutes for the coelom by providing a space for organ development and circulation of bodily fluids? A. mantle cavity B. mantle C. foot isceral mass E) both B and C 25) Currently the only predators of Galápagos marine iguanas are Galápagos hawks. Iguana body size is not correlated with risk of hawk predation, although small iguanas can sprint faster than large iguanas. If predators (e.g., cats) that preferably catch and eat slower iguanas are introduced to the island, iguana body size is likely to in the absence of other factors; the iguanas would then be underselective outcome. A. increase; directional B. increase; disruptive C. decrease; directional D. decrease; stabilizing E. stay the same; stabilizing 26) Based on how you would go about measuring biodiversity, which of the following is true? A. The easiest animals to study are the insects as they are so large. B. Bacteria are among the easiest to count regarding numbers of different species. C. Species in the tropics are much easier to study than species in other biomes. D. The most intensively studied lineages are vertebrates. 27) A cephalopod's tentacles are modified from its A. mantle foot D, HAM E" radula B. visceral mass 8) True or False My favorite familial taxon of hexapoda are the formicids (ants) A. True B. False awn as good pollinators, what group of plants do they visit? D. Non-vascular E) both B and C hoos are known c pteraphvta

Explanation / Answer

25)
C. Decrease, directional

Reason: The size of iguanas will decrease because the larger iguanas will get preferentially eaten by the newly introduced predator species and hence smaller size will get selected. This will be a directional selection because one of the extremes (small size) of the phenotype is preferred.

26)
C. Species in tropics are much easier to study than species in other biome.

Reason: Tropical biodiversity is very high and hence measuring biodiversity becomes easier. Easier in the sense that, since the number of species is so high the penalty of missing out one or two species while making a census is relatively low.
Option A is false since insects are neither large nor easier to study.
Option B is false because bacteria are the toughest to count.
Option D is not related to the question and I am sure vertebrates are not the ones who are most intensively studied.

Related Questions

Navigate

• Browse (All)
• Browse 2
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.