What percentage of human sperm cells carry an X chromosome?

a. 0%

c. 50%

b. 25%

d. 100%

A database is an efficient way to share information because it

Which type do of tissue functions as an absorber of digested nutrients

Name five kingdoms to classify living organisms

How do monkeys swing vine to vine?

If your greenhouse was built in the desert southwest, many plants would use a different pathway for photosynthesis. Describe the C4 pathway.

A scientific name has to refer to what

The changes in the surrounding environment can have an effect on plants too for a few weeks on the autumn season normally green leaves of deciduous plants acquire a red to yellow color how and why does this change in color happen?

Many of the biochemical reactions that occur within cells are catalyzed by enzymes. Which of the following statements is true about most enzyme-assisted reactions?

A cheeseburger from a fast food restaurant contains 19 g of fat, 20 g of carbohydrate, and 28 g of protein. How many kcal of energy does the cheeseburger contain

How do enzymes catalyze chemical reactions (don't just say "they lower the activation energy", give me specific mechanisms) ?