Question

Why should scientists consider both the adult body plan of an animal and its pattern of embryological development when classifying an animal? Use an example to support your explanation.

Answer 1

26. The fossil skull of Sahelanthropus has the broad face characteristic of hominines, but it has a brain the size of a chimpanzee's. As a result, scientists have been unable to classify this fossil. Name two other pieces of fossil evidence that could help scientist classify Sahelanthropus as a hominine.

Answer 2

27. What geological force caused anthropoids to split into two groups 45 million years ago?

Answer 3

28. Suppose you uncovered the fossilized skull of an animals. How could you use its teeth to help determine whether it was a carnivore or a herbivore?

Answer 4

29. In what ways are lungs and gills similar?

Answer 5

30. Why do you think keeping salt water shellfish such as clams and mussels in freshwater kills them?

Answer 6

31. Every November, tens of thousands of Sally Lightfoot crabs on Christmas Island leave their rain forest at the same time. They march across the island to the sea in huge groups, arriving just in time to mate at high tide. About a month later, tens of thousands of baby crabs march back across the island to the rain forest. Based on this information, what type of fertilization would you expect to discover in this species? Explain your answer.

Answer 7

Use the figure above.
Sequence: In the system above labeled B in Figure 27-11, where does oxygen-poor blood go after leaving the heart? Why?

Answer 8

Use the figure above.
Interpret Visuals: In Figure 28-7, what information indicates that meiosis takes place during the jellyfish's reproductive cycle?

Answer 9

this just shows the questions that i need help with