When you are exposed to sun light for a long time your skin which otherwise appears normal gets heavily tanned what could be the reason?

What structures do animal cells must have to produce protein

Are electric cars really better for the environment?

What is the role of hematopoietic growth factors? To influence hemocytoblasts to give rise to specific formed elementsTo stimulate an increase in the rate of blood clot formationTo stimulate the liver to produce more clotting factorsTo increase the

What happens to the apparent brightness of a star as you get closer to it? It gets brighter. It gets dimmer. It gets larger. It gets smaller.

What occurs in all cells and can take place either with or without oxygen present

How does waste move from the kidney to the bladder in the human excretory systems

A plant uses energy from the Sun to make food. What kind of energy transformation is this? a. light energy to chemical energy b. chemical energy to light energy c. mechanical energy to chemical energy d. light energy to mechanical energy

The major body structures and organ systems form during which trimester

What is the main female sex hormone? is it d? testosterone adrenaline insulin estrogen

What kind of a Erosion involves dissolved particles