Which are structures of the excretory system? Select four options.

kidney

spleen

bladder

esophagus

ureter

urethra

Which trait is most likely linked to having a bent wing in the fruit fly in the figure above? A. vestigial wing B. curved wing C. dumpy wing D. speck wing

Why do some regions specialize in "milk products" like cheese and butter rather than fluid milk? identify some of these important regions?

Using the periodic table, fill in the following table with the number of electrons in each energy level of the element given. oxygen n=1 n=2 n=3 n=4

C. Single and Double

Where in your body is there an enzyme that does function at a high or low pH? What is the name of the enzyme and its function?

Fossil records suggest major changes in early vascular plants that favored the evolution of land plants. Which was one of these major changes? Select one of the options below as your answer: A. Development of fruit B. Development of seed C.

Many people in the developing world who depend on rice in their diet suffer from diseases related to deficiencies of

Why does biology have to be a subject

Differential reproduction of genotypes leads to evolution via what process? inbreeding natural selection genetic rescue genetic drift mutational load

Why is carbon essential to all known life on Earth?