When in life does the production of sperm begin?

1. Explain why humans require oxygen to survive and discuss the metabolic consequences of oxygen deprivation (hypoxia) such as during drowning or high altitude climbing.

What drives the ATP synthase reactions that produce ATP? the redox reaction that changes NADH to NAD + the energized electrons from the electron transport chain the formation of water at the end of the electron transport chain the hydrogen ion

Energy from the sun showers the Earth every day. Which are better at utilizing it: heterotrophs or autotrophs? Explain your answer.

Which is a part of the cell theory? cells come from pre-existing cells cells have a nucleus organisms with one cell must be seen with a microscope organisms must have more than one cell to live

If an organism has 32 chromsomes in its somatic cells it comes from an egg cell that contains how many chromosomes

Which layer of the eye completely surrounds the eye except for a dark, round opening called the pupil?

Which type of animal does the rainforest contain more than 4,000 different species of? A. birds b. cats c. butterflies d. spiders

These are singular, relatively long, whip-like organelles that many unicellular organisms use for motion.

Which element is classified as a noble gas? Sulfur, oxygen, argon or nitrogen

In horses, black hair color is dominant to chestnut hair color. If the black horse is homozygous, what is its genotype? If the black horse is heterozygous, what is its genotype?