Human hormones testosterone and estrogen are considered lipids. What could be the reason for this?

They are phospholipids.

They are fatty acids.

They are steroids.

1. What does the term solstice mean? 2. What does the term equinox mean? 3. How many hours of daylight does the Northern Hemisphere receive on March 211 4. When does the summer solstice occur in the Northern Hemisphere? 5.

How does the CO2 entering the atmosphere compare to Earth's natural carbon cycle?

A rock contains 12.5% of its orignal K40 (half life = 704 million years). How old is the rock?

If you increase an object's volume by adding more of the same material, you increase the mass of the object. True Or False?

In order for speciation to occur, what is needed

Which example best describes one way that humans contribute to the water cycle? A. formation of genetic material B. evaporation of sweat from skin C. production of oxygen D. fixation of nitrogen into ammonia

How would signaling be affected if a mutation caused a g protein to replace gdp with gtp on its own without needing to be activated by the g protein-coupled receptor?

The role of an organism in the ecosystem is called its A. niche B. habitat C. species D. environment

Which condition will increase the rate of chemical reaction?

Why does DNA has an overall negative charge?