What do all ecosystems have?

a. biotic parts only

b. abiotic parts only

c. producers only

d. biotic and abiotic parts

Which is a type of virus? A. Capsid B. Bacteriophage C. Bacteria D. Pilus

If a person does not consume alcohol where would the alcohol (that this enzyme breaks down) come from?

What is likely to happen if the grasshopper population is wiped out? A. The prairie dog population decreases significantly. B. The grasshopper population immediately recovers. C. Vultures grow larger. D. Coyotes begin to eat prairie grass.

Why is it wise for a woman who is a carrier of the hemophilia gene to keep her son from being circumcised?

The final stable state of a succession is called the

Question 1 Which one of the following supports the hypothesis that life has changed over time? Prokaryotes have no nucleus. The cell has no membrane. Some fossil plants have deep roots. Fossils are distinct from rock layer to rock layer.

Jesse finds a burned-looking rock outside near a small crater. What has she most likely found? a comet an asteroid a meteor a meteorite

2 ways seeds can be carried by animals

Without adding specific regulatory proteins, how might you stimulate transcription from the gene of interest relative to the transcription of the other genes on your DNA template?

Which process copies from DNA onto mRNA