#Question id: 8851
#Unit 9. Diversity of Life Forms
Why is territoriality an adaptive behavior for songbirds maintaining populations at or near their carrying capacity?
#Question id: 8852
#Unit 9. Diversity of Life Forms
The upper forelimbs of humans and bats have fairly similar skeletal structures, whereas the corresponding bones in whales have very different shapes and proportions. However, genetic data suggest that all three kinds of organisms diverged from a common ancestor at about the same time. Which of the following is the most likely explanation for these data?
#Question id: 8853
#Unit 9. Diversity of Life Forms
Which of the following is correctly associated with sponges?
#Question id: 8854
#Unit 9. Diversity of Life Forms
Which cells in a sponge are primarily responsible for trapping and removing food particles from circulating water?
#Question id: 8855
#Unit 9. Diversity of Life Forms
A spongeʹs structural materials (spicules, spongin) are manufactured by the
#Question id: 8856
#Unit 9. Diversity of Life Forms
Which of these can be observed in the
mesohyl of various undisturbed sponges at one time or another?
1. amoebocytes
2. spicules
3. spongin
4. zygotes
5. choanocytes