Which is an example of a vestigial structure?

(A) forelimb of a whale

(B) wings of an eagle

(C) pelvic bone of a whale

(D) tailbone of a monkey

The cause of humanity's increased water consumption is an increased population. What is the effect? A. less potable water, a growing threat to biodiversity B. more potable water, a growing threat to biodiversity C.

the fossil record indicates that several times in the past, huge numbers of species have disappeared suddenly in phenomenon know as

Sharks and dolphins look very much alike--both have streamlined bodies, fins, and sharp teeth. Sharks and dolphins, however, are not closely related. The body structures that characterize sharks and dolphins have evolved independently.

Geologists observed signs of widespread ancient glaciers from the same time period in areas across South America, Africa, Antarctica, India, and Australia What theory did this observation support?

How many amino acids are found on the chain?

Binary fission is reproduction in which two single celled organisms combine to form one single celled organism. a. True b. False

How does algal growth kill marine animals

As the wavelength increases, the frequency (A) decreases and energy decreases. (B) increases and energy increases. (C) decreases and energy increases. (D) increases and energy decreases.

What is the most efficient way to protect biodiversity?

Scientists claim that global climate change is threatening many species with extinction. Which statement provides the strongest evidence for this claim?