What can you conclude about a species heavily reliant on diffusible morphogens in early development?Group of answer choicesThey are likely to have small amounts of yolk and holoblastic cleavage.They are likely to have incomplete cleavage (a syncytium).They are likely to have activation via a calcium wave.They are likely to lack an organizer.

A species heavily reliant on diffusible morphogens in early development is likely to have small amounts of yolk and holoblastic cleavage.

Here's why:

1. Morphogens are substances that determine the fate of cells and their spatial positions within an organism during early development. They diffuse through the embryo, creating a concentration gradient that cells respond to.

2. In species with large amounts of yolk, the yolk can impede the diffusion of morphogens, making it difficult for them to reach all cells in the embryo. This is why species with a lot of yolk often rely on other mechanisms for cell fate determination.

3. Holoblastic cleavage is a type of cell division that occurs in embryos with little yolk. This type of cleavage allows for the even distribution of morphogens, as each cell in the embryo is in contact with its neighbors, allowing morphogens to easily diffuse through the embryo.

4. Therefore, a species that heavily relies on diffusible morphogens in early development is likely to have small amounts of yolk and holoblastic cleavage, as these conditions facilitate the diffusion of morphogens.

The other options are not necessarily related to the reliance on diffusible morphogens. For example, activation via a calcium wave is a common feature of many types of eggs at fertilization, not specifically related to morphogen use. Similarly, having an organizer or not, or having incomplete cleavage (a syncytium), are features that can vary among species and are not directly linked to the use of diffusible morphogens.