The derived characteristic of protostome development is found in which of the following phyla?

a. Cnidarians

b. Sponges

c. Echinoderms

d. Roundworms

Two fossils of the same species are found in both africa and south america. what does this indicate?

Which of the following is NOT considered a cause of the Dust Bowl? A. the amount of prairie grass that had been destroyed B. the lack of farmers in Oklahoma C. the practice of burning crop remains D.

The table shows results of an experiment that was replicated Which best describes the data? O They are neither precise nor reproducible. They are precise but not reproducible. O They are accurate and reproducible.

Recall that the Igf2 gene encodes for the growth hormone insulin-like growth factor in mice exhibits genomic imprinting with only the paternal allele being expressed.

What suggests that all the mammals alive today came from the same common ancestor.

What characteristic of Charales would enable them to survive a dry spell? sperm with flagella phragmoplasts sporopollenin chlorophyll a

Many Head Start programs have a community aide who A. tutors at-risk children in the home. B. gives families the money they need to survive. C. connects families to community resources they need. D. represents families at family/teacher conferences.

Stranded on an island, you have two sources of water to drink: salty ocean water and contaminated fresh water. explain your choice of drinking water and indicate why your selection is the best choice.

How are a hypothesis a prediction and an experiment related

Two species of garter snakes live in the same geographic area. One lives mainly in water and the other mainly on land; therefore, they rarely encounter each other and do not interbreed. What type of isolation is this?