In your lab, you notice that pea plants that were given a mixture of water and fertilizer have grown nearly three times as tall as pea plants that were given water only. This step of the scientific method is:

The process of embryonic folding begins in the week of development.

The inner cell mass of the blastocyst eventually develops into the .

Which of the following tissues is NOT derived from the ectoderm?

Match the following embryonic structures with their corresponding functions or derived components:

The embryonic period is critical for the development of all major .

The accumulation of fluid in the morula leads to the formation of the .

Which of the following structures is primarily formed from neural crest cells?

Embryonic folding is essential for the establishment of the gastrointestinal tract.

By the end of the embryonic period, the neural tube forms, which will give rise to the .