C32

Question 1

What is an embryo

Answer 1

A fertilized egg, made up of multiple cells

Question 2

How can embryos develop?

Answer 2

groups of develop into germ layers, which are diff layers of cells

Question 3

Steps of the development stage?

Answer 3

Zygote–> eight-cell–> blastula–> grastula

Question 4

What are triploblastic

Answer 4

diploblastic: have 2 germ layers, endoderm and ectoderm
triploblastic: have 3 germ layers, endoderm, ectoderm, MESODERM

Question 5

What are the 2 ways an embryo can develop?

Answer 5

Protosome and Deuterosome

Question 6

What is the difference between a protosome and deuterosome?

Answer 6

Protosome: spiral cleavage and determinate. proto(first) some(mouth)
deuterosome: radial and indeterminate
deu(second) some(mouth)

Answer 7

coelmate: surrounded by just the mesoderm
Pseduocoelemate: surrounded by mesoderm and endoderm

Question 8

Coelem (aka Body cavity) vs. germ layer

Answer 8

FLUID filled space, while a germ layer is a layer of cells (develops ecto, endo, meso)

Question 9

What does the archenteron develop into?

Answer 9

The digestive tube, mouth and anus

Question 10

What is a true tissue?