The round tough layer of a turtles shell is

If an energy pyramid tapers toward the top, what does it tell you about the biomass at the highest trophic level?

Which source is considered primary source of scientific information Original

Promoters are sequences of rna that are the start signals for tha transcription of mrna true or false

Blood has traveled from the heart to the toes. Which describes the next step of the circulation process? A. The blood releases oxygen on the way back to the heart. B. The blood travels to the lungs to get oxygen. C.

The valve between the distal portion of the esophagus and the stomach is known as the ___ sphincter

A) What are the bases of mRNA coded for by this section of DNA before the mutation? Hint in RNA A pairs with U.

How does secondary succession differ from primary succession? It begins where no plants have grown. It begins on bare rock or land. Soil nutrients are already in place. Lichens and mosses form soil first.

True of False? The structure of the cell membrane is what allows water and other molecules to move in and out of cells.

Dolphins and fish have similar body shapes. isthis feature more likely a homologous or analogoustrait?

Which of the following is not a phase of gastric secretion? A. cephalic B. gastric C. intestinal D. enterogastric