What characteristic is shared by birds, salamanders, and sharks?

A. Four limbs

B. Jaws and paired appendages

C. Endothermy

D. Lungs

Based on her pre-pregnancy weight, if she is carrying a single baby, how much weight should sadie gain during her pregnancy? a. 10 to 15 lbs b. 15 to 25 lbs c. 35 to 50 lbs d. 5 to 10 lbs e. 25 to 35 lbs

The sit of protein synthesis is

Which is NOT true regarding transport of molecules? A) Small, nonpolar molecules diffuse directly across the cell membrane. B) Large molecules, such as glucose, use membrane proteins to cross the cell membrane.

Shelly wants to know if hummingbirds prefer honey, sugar, or corn syrup. She creates three solutions of equal sweetness. One solution is made of honey and water; the second is sugar water, and the third is corn syrup and water.

Generation 1 51 49 100 Generation 2 185 95 280 Generation 3 240 80 320 Generation 4 325 75 400 Generation 5 450 30 480 Study the table above. A frog population was introduced to a new habitat.

A phenotype that results from a dominant allele must have at least ___dominant alleles present in the presents

In what way does controlling the proteins in an organism control the organism's characteristics?

One pound of muscle and one pound of fat are the same size and take up the same amount of space. a. True b. False

What is a model of the earths surface?

Why should you conserve natural resources by buying less stuff?