Hi!
It would be D, because trilobites were aquatic.
Hope this helps!
Answer:
Bodies of ice and rock that orbit the Sun and produce a coma and tail of vapor and dust when near the Sun
Explanation:
So if you go to the NASA dictionary it states:
Comet- cosmic snowballs of frozen gases, rock, and dust that orbit the Sun.
So it is most definitely the second option
Have a great day :D
Answer;
-Zygote
When sperm and ovum unite at conception, a zygote results.
Explanation;
-Conception occurs when a sperm cell from a fertile man swims up through the vagina and into the uterus of a woman and joins with the woman's egg cell (ovum) as it travels down one of the Fallopian tubes from the ovary to the uterus.
-A zygote is the union of the sperm cell and the ovum. Also known as a fertilized ovum, the zygote begins as a single cell but divides rapidly in the days following fertilization. After this two-week period of cell division, the zygote eventually becomes an embryo.
20.4 21.3 are the correct answers
