Jack observes the development of frog eggs. During his observations, he noticed that within a few hours of fertilization, the single-celled zygote went through a series of cell divisions. Which of these is the best interpretation?

A. The zygote is undergoing gastrulation.
B. The zygote is undergoing blastulation.
C. The zygote is undergoing cleavage.

The answer is C. cleavage.

Soon after the zygote is formed, the first cleavage occurs and the 2-cell stage is formed. The second cleavage forms the 4-cell stage and the third cleavage forms the 8-cell stage, and so on. A hollow ball of thousand cells is called blastula. After blastulation, during gastrulation three distinct germ layers are formed.

Explanation:

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The Bahamas comes in the top ten countries, which are most susceptible to the influences of climate change, comprising the loss of coastal lands because of the rise in the sea level.  

Due to this, the coral reefs in the Bahamas are also getting affected, and the scientists are not finding a diverse population of the organisms found on the coral reef there. Some of the factors, which are resulting in the issue are as follows:  

1. Habitat destruction primarily because of coastal development.  

2. Change in climate, mainly human-induced.  

3. Over-fishing, comprising both foreign and domestic poaching.  

4. Pollution and the introduction of invasive species.  

5. Trading of endangered species.