What are acoelomates, acoelomates, coelomates and pseudocoelomates

Select the situation bellow that would produce a total displacement of zero. a. a trip to the moon and then to mars b. a horse galloping from one end of a field to another c. the criss-crossing path of a bug as it flies from flower to flower d.a round-trip ride to school and back

What in scientific term why the salty popcorn causes this thirst

Explain what a zygote is. use the terms egg cell, sperm cell, and fertilization in your explanation.