What is a tetrad?

A. A chromatid before meiosis

B. Another term for a sperm cell

C. A haploid cell produced by meiosis

D. Two sets of sister chromatids

Select the correct answer from each drop-down menu. The lac operon in E. coli regulates genes that code for enzymes required for breakdown of lactose. The lac operon is operon that is activated in the presence of.

What are the differences in mrnas of cancer cells and normal cells?

Describe the effect of the vaccinations on death rate in the wildebeest population

What are sedimentary rocks? A: Formed from pieces of weathered rock cemented together. B: Forms from cooling molten rock. C: Formed from existing rock that experiences high levels of heat and/or pressure.

A species was added into a particular ecosystem to control the population of a prey species. This method of introducing a new species is called (biological augmentation), (bioremedation), or (reforestation).

The process of transducing air pressure waves into neural messages that the brain interprets as meaningful sound is known as

Why does photosynthesis require water? a. because water provides oxygen atoms. b. because water provides electrons. c. because water accepts electrons. d. because water acts as a catalyst.

An education guess or rational explanation about a specific phenomenon

What are the technical name for red blood cells white blood cells and platelets?

What are the resources of the ocean