Which statement about metamorphosis is true?

Which statement about metamorphosis is true?

• A. Metamorphosis refers to changes in shape, form, and size during life
• B. Metamorphosis refers to changes in color only
• C. Metamorphosis means insects grow but do not change form
• D. Metamorphosis occurs only in vertebrates

Answer: (A)

Metamorphosis is a developmental process where an animal undergoes noticeable changes in body form and structure during its life, often accompanying growth. It isn’t just getting bigger or changing color; it involves transforming from one kind of body plan to another, such as a larval stage that looks very different from the adult. That’s why the statement describing metamorphosis as changes in shape, form, and size during life best captures what metamorphosis means. For example, a caterpillar turns into a butterfly, or a tadpole becomes a frog, illustrating substantial changes in form, not merely color or straightforward growth. The other ideas—color changes only, growth without form change, or occurring only in vertebrates—don’t fit the broad, transformative concept of metamorphosis.

Metamorphosis is a developmental process where an animal undergoes noticeable changes in body form and structure during its life, often accompanying growth. It isn’t just getting bigger or changing color; it involves transforming from one kind of body plan to another, such as a larval stage that looks very different from the adult. That’s why the statement describing metamorphosis as changes in shape, form, and size during life best captures what metamorphosis means. For example, a caterpillar turns into a butterfly, or a tadpole becomes a frog, illustrating substantial changes in form, not merely color or straightforward growth. The other ideas—color changes only, growth without form change, or occurring only in vertebrates—don’t fit the broad, transformative concept of metamorphosis.