A Level Biology Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Master the A Level Biology Exam. Use flashcards and multiple choice questions with hints and explanations to ace your test. Start your journey to excellence!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What is a zygote?

The final stage of embryonic development
A type of mature seed
The initial diploid cell formed after fertilization
The process of cell division in embryos

The correct answer is: The initial diploid cell formed after fertilization

A zygote is defined as the initial diploid cell formed after fertilization occurs when a sperm cell merges with an egg cell. This single cell carries genetic material from both parents, resulting in a unique combination of DNA. The zygote undergoes numerous mitotic divisions as it develops into an embryo, marking the very beginning of the organism's development. This option accurately describes the zygote's role in the reproductive process, laying the groundwork for all subsequent developmental stages. Understanding the zygote is fundamental in biology, as it represents the first step toward forming a new organism.