At the end of the mitotic cell cycle, a cell divides into two cells. What must happen before the cell divides?

A

The number of organelles doubles.

B

Chromosomes must be copied.

C

Four nuclei must be formed.

D

The membrane thickens.

Combustion is an example of what type of reaction? A. synthetic B. exothermic C. endothermic D. thermophyllic

What is produced by meiosis? A. All types of cells B. Reproductive cells C. Skin cells D. Hair cells

Compare and contrast sexual reproduction of most animal and plants vs asexual reproduction of bacteria.

Which atoms form an ionic bond

After nervous stimulation stops, what prevents ACh in the synaptic cleft from continuing to stimulate contraction? A. acetylcholinesterase destroying the ACh B. the tropomyosin blocking the myosin once full contraction is achieved C.

Genetic material is being duplicated during which phase of the cell cycle? A. D phase B. M phase C. interphase D. G0 phase

Choose the correct process for the description given: does not require light

Samuel visited an ecosystem. he found that the weather is very hot and dry, the entire land is surrounded by sand, and the plants that have thorns with fleshy leaves. which ecosystem did samuel visit? a. tropical rainforest biome b. desert biome c.

Visit the website below and use the information to answer the following question. Ecological Succession: Transformation of Communities over Time Why does secondary succession occur faster than primary succession?

What are four characteristics within a sedimentary rock?