Where in the plant does photosynthesis occur

Describe the process of meiosis that ensures that both maternal and paternal chromosomes are passed on to each spermatozoon

How far back does the fossil record extend? a. 1 billion years b. 560 million years c. 3 million years d. 3.5 billion years

Which type of cell can become any type of tissue in an embryo, but not a placenta cell? A. Somatic B. Multipotent C. Totipotent D. Pluripotent

What does an organism's genotype describe? A) The allele combination for a trait B) The physical appearance of a trait C) The number of alleles on a gene D) The number of different traits inherited

Scientists believe that Homo neanderthalensis appeared about a. 200,000 years ago b. 2 million years ago c. 10,000 years ago d. 1.4 million years ago

Why is it important for young infants to not be given any solid foods before the recommended 4 - 6 months?

Plants are eaten by grasshoppers, which are eaten by mice, which are eaten by snakes. What will happen to the other members of the food chain if the grasshoppers are removed?

The chromosomes and genes in your feet differ greatly from those in your eyes because they are parts of separate organs.

Which proteins is used as a chemical defense at body surfaces?

Would you expect a field guide to have common names as well as scientific names?