What is the name of the first cell that results from either internal or external fertilization? 1. fetus
2. egg cell
3. embryo
4. zygote

Explanation:

The stages in order are egg cell, zygote, embryo and fetus. Zygote is what comes right after fertillization, so the answer is 4. zygote.

4. zygote

Explanation: Humans provide an example of the former whereas seahorse reproduction is an example of the latter. Fertilization, is the process in which gametes (an egg and sperm) fuse to form a zygote. The egg and sperm each contain one set of chromosomes.

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plz mark brainleist

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.

a symbiotic relationship with the mitochondria