Which protein serves as a chemical messenger?

1) hemoglobin

2) actin

3) myosin

4) insulin

Tropical rainforests generally have a higher density of organisms compared with other biomes. Based on this information, which of the following is likely true about soils in tropical rainforests? A. Tropical rainforests generally have no topsoil. B.

Which of the following is a characteristic of blood type AB+? has antibodies A and B in the blood plasma has antigens A and B on the red blood cells has no Rh antigen on the red blood cell has antibodies O in the blood plasma

What is the life expectancy of stage 4 sarcoidosis?

List the key difference between meiosis 1 and meiosis 2

Correctly use the following words in a well-written, scientifically correct paragraph. Be sure to clearly distinguish the differences between each of them and how they intertwine! Be sure to provide examples.

redwoods are the tallest species of tree in the world. explain how transpiration causes water to travel from the roots to the branches of a tree this size.

During photosynthesis, chloroplasts use light energy to convert carbon dioxide and water into sugar and oxygen. Which term best classifies the energy stored in the products of photosynthesis?

What did Chargaff discover while studying bases in the DNA of organisms? The bases in the DNA of each organism were unique. The ratios of thymine and adenine were similar, as were the ratios of guanine and cytosine.

What is one way a plane can form?

Where does diffusion take place