By how much did carbon dioxide levels increase from 1980 to 2000?

A. 22 ppm

B. 32 ppm

C. 45 ppm

D. 51 ppm

The only predator that is not only prey?

A dog chasing a rabbit needs energy from the food it has eaten. Which process makes the most usable energy for the dog? A. the citric acid cycle B. photocynthesis C. the electron transport chain D. glycolysis

What is the relationship between genes and alleles? A. Genes carry instructions for proteins that express traits. Alleles are alternative forms of the instructions. B. Genes are proteins that express traits.

Differentiate between prokaryotic and eukaryotic cells

RR is dominant and rr is recessive?

Which of the following statements about the germ layers is NOT correct? - The germ layers (ectoderm, mesoderm, and endoderm) arise from the embryonic disk. - The endoderm gives rise to the nervous system.

Why are the oceans becoming acidic? A) Because of global cooling B) Because of excess carbon dioxide in the atmosphere reacting with water and forming carbonic acid C) Because of the dissolution corals (calcium carbonate) D) Because of alkaline rain

What is the possible genotype and phenotype for the dominant trait circular flower and recessive trait square flower

What is representative organism?

What multipies to get - 12 but also has a sum of 4