In order to explain how the first eukaryotic cells may have evolved, scientists proposed the

A. theory of solar nebula.

B. theory of spontaneous generation.

C. theory of endosymbiosis.

D. theory of autotropic evolution.

Describe the major contribution of Dalton's atomic theory to the understanding of atomic structure. A) Electrons can only be located in circular, concentric shells. B) Chemical elements are made up of identical units called atoms.

At the end of the chromatography process you observe that the developing solution is bright green. what is the most likely explanation for this?

Who believed children are born noble savages

Which abbreviation means any disease that interfers with the ability of coronary arteries to deliver sufficient blood to the heart muscle:?

22) All organisms undergo DNA replication for reproduction, growth, repair, etc. DNA replication occurs just before the process of A) meiosis. B) mitosis. C) transcription. D) translation.

In a plants stem the vascular tissue is A. is always arranged in rings of vascular bundles B. is continuous from the roots to thel leaves C. carriers nutrients up the stem but not down D. plays a role in photosynthesis and storage.

During which stage of sex cell formation does the number of chromosomes decrease from diploid (2n) to haploid (n) ? a. prophase 1 b. prophase 2 c anaphase 1 d. anaphase 2

What would most likely interest an environmental scientist

Do you believe you have a personal responsibility to protect the environment

What happens to the total charge of the compound after the ions bond together?