Answer both a and b pls

How many trophic levels are there in the following food chain? phytoplankton - shrimp - perch - pike - osprey

If you are in a chronic state of anxiety but also suffer from moment of sudden, intense fear you are problably suffering. from

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.