Which structure maintains homeostasis, contains active transport pumps, and is composed of two layers of phospholipids

In the diagram below, the northern hemisphere would be in what season at position a a. fall b. winter c. summer d. spring

What is the difference between sex-linked traits and autosomal traits in humans? a. sex-linked traits can only be passed from fathers to sons, while autosomal traits can be passed on from both parents to offspring of any sex. b. sex-linked traits are passed on through the x and y chromosomes, while autosomal traits are passed on through the other 22 chromosomes. c. sex-linked traits only affect females, while autosomal traits affect both males and females. d. sex-linked traits refer to genes that are on the x and y chromosomes, while autosomal traits refer to genes on all 23 chromosomes.

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion