Answer:
Convection currents are the result of differential heating. Lighter (less dense), warm material rises while heavier (more dense) cool material sinks.
Answer:In the given scenario, Brian uses audience involvement to open his presentation.
Explanation:
For the majority of spectators in an audience, paying attention to a presentation for any amount of time can be quite hard. If they do not feel engaged by the speaker, they will lose their attention, and probably will not benefit from the information presented at all. This is why a presentation should have a lot of energy, a defined purpose, and be totally direct (as if the audience was an individual and it was a one-to-one conversation), to involve the audience.
Answer: Interactions of Hormones at Target Cells. Hormones that act to return body conditions to within acceptable limits from opposite extremes are called antagonistic hormones.
Explanation:
Answer:
Gastrulation.
Explanation:
Zygote is formed by the fusion of the male and female gamete. The zygote undergoes the process of cleavage to form the different embryonic stages of the offspring.
Gastrulation is the important process of the pre embryonic development. The blastula get multiply and rearranged to form the gastrula. The gsatrulation process includes the formation of three germ layers also known as triploblastic embryo. The three germ layers are ectoderm, endoderm and mesoderm.
Thus, the correct answer is option (C).
