Which best describes a theory?

A. a well-supported conclusion

B. a proven fact

C. an educated guess

D. an untested claim

In what way is the small intestine small

A gray wolf's sperm contains 393939 chromosomes. He mates with a female gray wolf. How many chromosomes will there be in the resulting zygote?

What are the two types of surface waves? Describe them.

Where does aerobic respiration take place in prokaryotes?

Which of these is an example of an environment changing slowly? A. Forest succession B. Volcanic Eruption C. Hurricane D. Flooding

The ___ ventricle pumps blood to the pulmonary circuit, while the ___ ventricle pumps blood into the systemic circuit.

In what ways are mosses liverworts in the hornworts words similar

Carbon-14 has a half life of 5,770 years. A fossil was found that had 1/32 of its original Carbon-14 remaining. How old is the fossil?

Why are many trials taken and averaged in an experiment?

Northern flickers are woodpeckers of the eastern United States. Males, but not females, have black feathers that resemble a moustache extending from the bill along each side of the head.