The Single Cell Formed from the Union of Two Gametes

question 62

Multiple Choice

The single cell formed from the union of two gametes, a sperm and an ovum, is called a _____.

• A) chromosome
• B) phenotype
• C) genotype
• D) zygote

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Definitions:

Hemoglobin

A protein in red blood cells that carries oxygen from the lungs to the body's tissues and returns carbon dioxide from the tissues back to the lungs.

Carbon Monoxide

A colorless, odorless, and toxic gas produced by incomplete combustion of carbon-containing materials, dangerous to humans and animals when inhaled.

Carbon Dioxide

Carbon dioxide is an invisible, scentless gas that results from the combustion of carbon and organic materials as well as the process of respiration. It occurs naturally in the atmosphere and is taken in by plants for the process of photosynthesis.

Respiratory Surfaces

The parts of organisms where gas exchange between the external environment and the internal tissues occurs, typically thin, moist, and highly vascularized for efficient diffusion of gases.