Which of the following processes is affected by the amount of yolk present in an embryo?Multiple choice question.GastrulationMeiosisMitosisOrganogenesis

The process that is affected by the amount of yolk present in an embryo is Gastrulation.

Here's why:

1. Gastrulation is the process in embryonic development that involves the reorganization of the blastula into a structure known as the gastrula. It forms the three primary germ layers of the embryo, which are the ectoderm, mesoderm, and endoderm.

2. The amount of yolk in an egg can affect how gastrulation occurs. In species with a lot of yolk, the yolk can physically impede the movement of cells during gastrulation, affecting the way the germ layers form.

3. Meiosis and Mitosis are cell division processes and are not directly affected by the amount of yolk in an embryo.

4. Organogenesis, the process by which organs form from the germ layers, occurs after gastrulation. While it could be indirectly affected by the amount of yolk (since yolk can affect gastrulation), it's not as directly influenced by yolk amount as gastrulation is.