Which of these are a compound?

A. Oxygen C. an element

B. water D. air

How does an organism become a species?

Wild mustard was selectively bred to produce a group of vegetables notable for their:

What is the name and function of each sensory organ on a frog's head?

When comparing protein-coding DNA sequences of similar genes in related species, you see that some of the sequences are longer in one species compared to the other. Which of the following is the most likely number of extra bases that you would see

A group of parts that work together is called a

Kristyn is thrilled to hear she is expecting twins. her doctor informs her that the twins are dizygotic. what does this mean?

Chromosome duplication, which happens during mitosis, occurs in the what?

Which is not a characteristic that all living organisms share

A scientist claims plants can communicate with each other in a variety of ways. justify the claim of the scientist and describe the types of responses that result from the communication of two different plants.

Which of these scenarios illustrates natural selection due to behavior