What is the sex of a person with two X chromosomes

The process by which stem cells become specialized cells is called? A.) Elongation B.) Differentiation C.) Growth D.) Speciation

Organic molecules are sometimes found within meteorites that crash into Earth. Which meteorite condition in space is similar to what most likely was present on early Earth?

Which is a better way to pollinate tomatoes? Naturally or artificially?

Anton thinks that glucose is a reactant of photosynthesis, but his classmate Jamila disagrees. Who is correct, and why? Anton is correct because glucose is a substance that is present before the chemical reaction of photosynthesis takes place.

True or False: Skeletal muscles are found in the heart

5. The blob operon produces enzymes that convert compound A into compound B. The operon is controlled by a regulatory gene S. Normally these enzymes are synthesized only in the absence of compound B.

What is the result of a dietary protein deficiency? increased synthesis of proteins a weakened immune system enhanced nutrient absorption increased bone turnover decreased breakdown of body protein

A student and teacher working together to answer an experimental question is an example of

Explain how the Earth's rotation and revolution about the Sun affect its shape and is related to seasons and tides.

Secretions from the skin, such as a