Development — Science definition
Changes that form and organize an organism across its life cycle.
Where it is taught
- Reproduction & Development — Cell Division, Reproduction & Development, Life Science: Biology, Grade 10
In use
Development also requires cells to differentiate, communicate, move, and form organized structures; simply doubling identical cells is insufficient.
Reproduction & Development
Questions using development
Problem 1
Which is needed for development beyond increasing cell number?
- Differentiation and organization
- All genes permanently switching off
- Loss of every membrane
- Elimination of all signals
Answer and explanation
Differentiation and organization
Cells must acquire coordinated roles and structures.
Problem 2
Connect meiosis, fertilization, and development in three sentences.
Answer and explanation
Meiosis produces haploid gametes in the animal model. Fertilization combines gametes to form a diploid zygote. Regulated division, differentiation, and organization develop tissues and organs.