Virginia Biology SOL Practice Test

Question: 1 / 400

What term describes an animal organism in the early stages of growth and differentiation?

Fetus

Embryo

The term "embryo" specifically refers to an animal organism in its early stages of development, following fertilization and before it reaches the later stages of growth. During this embryonic stage, the organism undergoes significant changes as cells divide and differentiate into various tissues and organs. This stage is crucial for laying the foundation of the organism's structure and functions.

In contrast, the term "fetus" is typically used to describe a later stage of development in mammals, when the major organs have formed and the body is starting to take on a more recognizable form. "Larva" refers to a distinct life stage in some organisms, such as insects, where they undergo transformation; it is not synonymous with the early stages of development across all animal species. The term "adult" indicates a fully developed organism capable of reproduction, which is far removed from the early stages of growth and differentiation.

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Larva

Adult

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