What do scientists estimate is the approximate age of the planet earth? A. 660 million years B. 3.5 billion years C. 4.6 billion years D. 12.2 billion years

A particular environment has enough food to support 50 rats through the winter. At the end of winter one year, there are 25 female rats and 25 male rats. Each of the 25 females gives birth to several litters of 3-6 pups each.

Jenny, her mom, and her grandfather are all good basketball players. Give an example of aquired trait and an inherited trait that could contribute to their skill at basketball.

During which state of photosynthesis are atp and nadph converted to adp and nadp+?

How much sperm does a man produce each day

Which was not a result of th 1898 discovery of the four blood types? 1. Improved blood transfusion safety 2. Effective blood preservation solutions developed 3. Elements of blood separated via centrifuge 4.

A common element among all the river valley civilizations was: irrigation systems that moved water to crops and settlements developed plumbing systems developed written materials the worship of leaders as God's

A person's skin cells and eye cells make different types of proteins to perform their functions. What is the source of the instructions from which all of the proteins are made? (A) Genes (B) Mitochondria (C) Ribosomes (D) Gametes

Small masses of neuron cell bodies located outside the cns are called?

As hawkeye and the men neared the huron encampment, what signal did they agree to give in order to warn one another?

An organisms ability to maintain its proer condition