Animals are ________ that ingest their food.
animals are multicellular ________.
animal cells lack _____ ______. (NOT cell membranes)
________ are groups of cells that have a common structure and/or function.
after a sperm fertilizes an egg, the zygote undergoes rapid cell division called _______.
cleavage leads to a formation of a ________.
the blastula undergoes _________, forming gastrula with different layers of embryonic tissues.
(slide 5- know what it looks like)
a ________ is a sexually immature and morphologically distinct from the adult.
larva eventually undergoes __________.
all animals, and only animals, have ______ ______ that regulate the development of body form.
zoologists sometimes categorize animals according to a _____ _____, a set of morphological and developmental traits.
Some animals have _____ ________.
two sided symmetry is called ______ _________.
a _____ (top) side, and a _______ (bottom) side.
a right and left ______ sides.
_______ (head) and ________ (tail) ends.
_________, the development of a head.
During development, three ____ ______ give rise to the tissues and organs of the animals embryo.
Most diploblastic animals possess a _____ _______.
a true body cavity is called a ______ and is derived from mesoderm.
__________ are animals that possess a true coelom.
a ___________ is a body cavity derived from the mesoderm and endoderm.
Triploblastic animals that lack a body cavity are called ___________.
based on early development, many animals can be categorized as having ________ development or _________ development.
protostome development, deuterostome development
in protostome development, cleavage is _______ and ________.
in deuterostome development, cleavage is _________ and _________.
in protostome development, the blastopore becomes the ________.
in deuterostome development, the blastopore becomes the _______.