About how many years ago do scientists suggest that the earth cooled enough for water vapor to condense.

A) 20 millions years

B) 4.6 billion years

C) 4.4 billion years

D) 5.5 billion years

The protostome developmental sequence arose just once in evolutionary history, resulting in two main subgroups-Lophotrochozoa and Ecdysozoa. What does this finding suggest?

for each of the following organisms, describe how digested food reaches their body cells: a hibiscus plant, a paramesium, a coral polyp, an earthworm, a mosquito a human

Which particle has a charge of - 1? A. Proton B. Neutron C. Electron D. Nucleus

Which cells are most likely to have the gene for making telomerase switched on?

How did land whales eventually became aquatic?

At the beginning of cellular respiration, energy is stored in the bonds of blank molecules. At the end of cellular respiration, energy is stored in the bonds of blank molecules. for each one has the options of: ATP, glucose, or oxygen

Which of the following does not contain carbon and energy iron ice cream lettuce or eggs

In what ways has poland suffered because of its lack of natural barriers

Which of the following statements is/are true? a. Loose connective tissue includes cartilage. b. Closely packed bundles of collagen fibers are characteristic of loose connective tissues. c.

Identify twice substances that can cause changes in DNA