Cytosine is a

A) Purine

B) Pyrimidine

C) Sugar

D) Protein

Which term means "water-loving"

What do scientists think the effect will be of having more greenhouse gases in our atmosphere? A. More warming of the atmosphere B. More cooling of the atmosphere C. Less air in the atmosphere D. More air in the atmosphere

What is overproduction? a-individuals produce offspring with too many traits. b-some individuals produce more offspring than others. c-more offspring are produced than can survive. d-some offspring mate with too many partners.

Bones are connected to each other by: A) nephrons B) neurons C) ligaments D) tendons

What is 16 chirps/min in tempeture

What is believed to be the first type of cells on earth? a. tree cells b. eukaryotic cells c. prokaryotic cells d. plant cells

What would happen if a mistake is made during protein synthesis?

Which of the following can upset the balance of an ecosystem? too much water not enough water too much light not enough light all of the above none of the above

At the end of telophase, what must occur? the cytoplasm is divided by cytokinesis the new cells must immediately begin to divide again the new cells fuse together to create one larger cell the cell begins to divide by replicating the chromosomes

What do these characteristics all have in common? A. They are all dominant. B. They can all be easily observed. C. They are all recessive. D. They can all be applied to other plants.