Which Group of Organisms Has the Greatest Percentage of Species

question 64

Multiple Choice

Which group of organisms has the greatest percentage of species in danger of extinction, according to the International Union for Conservation of Nature (IUCN) ?

• A) plants
• B) mammals
• C) birds
• D) reptiles

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Definitions:

Secondary Sex Characteristics

Features that appear at puberty which are not involved in reproduction but distinguish the sexes, such as breast development in females and facial hair in males.

Physical Maturation

The process of becoming fully developed physically, which includes growth and the development of bones, muscles, and organs.

Fertility

The natural capability to produce offspring; a measure of reproduction efficiency.

Hormones Impact

The effects that hormones have on the body's processes and functions, influencing mood, growth, metabolism, and reproductive health.