Animal Reproduction, Development, and Classification

Question 1

Animals with a coelom are called

Accepted Answer

coelomates

Question 2

During mating in earthworms, each partner passes sperm to each other, fertilizing one another. This is

Accepted Answer

simultaneous hermaphroditism

Question 3

What is gastrulation?

Accepted Answer

converts the spherical blastula into a second germ layer

Question 4

In the image below, what stage of development is shown?

Accepted Answer

zygote

Question 5

For protostomes, the blastopore becomes the

Accepted Answer

mouth

Question 6

The first cell layer formed from blastomeres is

Accepted Answer

ectoderm

Question 7

In terms of animals (not bacteria, fungi, or plants), asexual reproduction appears mostly in

Accepted Answer

invertebrates

Question 8

When cells divide and new cells form at an angle to old cells, this is called _______ cleavage

Accepted Answer

spiral

Question 9

A spider is an example of a(n)

Accepted Answer

invertebrate

Question 10

In animal kingdom phylogeny, starfish are part of

Accepted Answer

echinodermata

Question 11

A pseudocoelomate is an animal with

Accepted Answer

a body cavity partially lined with mesoderm

Question 12

Skin and nervous tissue form from the

Accepted Answer

ectoderm

Question 13

Symmetry that is irregular in shape.

Accepted Answer

asymmetry

Question 14

These germ layers are present in diploblastic animals:

Accepted Answer

endoderm and ectoderm

Question 15

In animal kingdom phylogeny, snails are part of

Accepted Answer

mollusca

Question 16

Reproduction best suited for organisms in unstable environments.

Accepted Answer

sexual

Question 17

Blind, or incomplete, guts are representative of

Accepted Answer

diploblastic animals

Question 18

Which germ layer develops into the musculoskeletal system?

Accepted Answer

mesoderm

Question 19

These germ layers are present in triploblastic animals:

Accepted Answer

endoderm, mesoderm, and ectoderm

Question 20

In the image below, what directional term is represented by the letter C?

Accepted Answer

ventral

Question 21

When cells go through specialization, and certain genes become activated, this is called

Accepted Answer

differentiation

Question 22

After fertilization between sperm and egg, what is the very first process to occur?

Accepted Answer

cell undergoes cleavage

Question 23

Triploblastic organisms usually develop to a(n) _________ level of organization.

Accepted Answer

organ

Question 24

When a starfish is split in half, and both halves grow into individual organisms, this is an example of

Accepted Answer

regeneration

Question 25

This form of symmetry enables an animal to reach out in all directions from one center.

Accepted Answer

radial

Question 26

A dog is an example of an organism with this form of symmetry.

Accepted Answer

bilateral

Question 27

Animals with a backbone are considered

Accepted Answer

vertebrates

Question 28

Mollusks, annelids, and arthropods are considered

Accepted Answer

protostomes

Question 29

In bilateral animals, the ________ or ________ end often has sensory organs.

Accepted Answer

anterior; head

Question 30

If you were in the ocean scuba diving, and you looked above you and saw the uderbelly of a shark, which side is this?

Accepted Answer

ventral

Animal Reproduction, Development, and Classification

Questions 30

Animal Reproduction, Development, and Classification

Questions 30