Which hominin may be a direct ancestor of our genus but had long arms, short legs, and grasping feet?
A) Homo erectus B) Kenyanthropus platyops
C) Australopithecus afarensis D) Homo neanderthalensis
Answer: C
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A mechanism shared by both extracellular and intracellular digestion is
A. the ability to phagocytose food particles. B. a slow speed of digestion. C. the presence of a digestive cavity. D. the ability to consume both large and small food items.
The oxygen in Earths atmosphere:
a. was manufactured inside stars. b. was added to the atmosphere by plant life. c. has grown more abundant since the origin of Earth. d. all of these e. none of these
This summer, you are returning to the research station in Costa Rica to follow up on the population of butterflies you have been studying. You are disappointed to find that there are fewer this year than last. In fact, at dinner your friends studying frogs and birds are complaining about the same thing. What type of influence do you suspect?
A. a density-independent effect like an introduced predator B. a density-dependent effect like environmental disruption C. a density-independent effect like environmental disruption D. a density-dependent effect like an introduced predator Clarify question: What is the key concept addressed by the question? What type of thinking is required? Gather Content: What do you already know about factors that affect many different populations of organisms? What other information is related to the question? Choose Answer: Given what you now know, what information is most likely to produce the correct answer? Reflection on Process: Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
The gross reproductive rate represents the number of births per 1000 population per unit of time
Indicate whether the statement is true or false