Which organism has a single Loop circulatory system

A. frog

B. human

C. fish

D. dog

Part a what is the function of rna polymerase? hints what is the function of rna polymerase? it adds nucleotides to the 5' end of the growing mrna molecule. it relies on other enzymes to unwind the double helix.

This characteristic of hydrogen and oxygen make the water molecule polar

Electron microscopy uses what type of light/energy?

Two bacteria grow together. One appears to donate DNA to the other. One of the bacteria contains a bacteriophage that is normally quiescent but occasionally forms a plaque. What sort of genetic exchange is most likely to be occurring

Put the steps of muscle contraction in order from first (1) to last (5). The sarcomere shortens. Calcium ions are released by a nerve cell. The sarcomere is relaxed. Actin and myosin overlap completely. Actin and myosin are activated.

What is one of the most important factors in determining whether a chemical reaction will occur?

What is a alleles in biology?

Sex-linked traits are found on which chromosome?

Most scientists recommend reducing carbon dioxide emissions. Less carbon dioxide in the atmosphere would be expected to

What effect on the evolution of mammals was caused when the continents drifted apart?