lab 8

Question 1

animals store their carbohydrates in the form of

Answer 1

glycogen

Question 2

life cycle dominated by the

Answer 2

diploid stage

Question 3

invertebrates

Answer 3

animals that do not have a backbone)

Question 4

vertebrates

Answer 4

animals that do have a backbone).

Question 5

main structural support is

Answer 5

collagen found only in animals

Question 6

feature that is unique ti animals

Answer 6

most animals have a blastula
that undergoes gastrulation as a stage in their development

Question 7

bilateral animals have

Answer 7

-A top (dorsal) side
– A bottom (ventral) side
– A front (anterior) end
– A back (posterior) end

Question 8

A small cluster of dividing cells with no increase in embryo size: ______

Answer 8

zygote

Question 9

A single, large, round cell formed immediately after fertilization: ______

Answer 9

cleavage

Question 10

A cluster of exactly 8 equal-sized cells: ______

Answer 10

eight stage cell

Question 11

a hollow ball of cells

Answer 11

blastula

Question 12

The fluid-filled cavity inside the hollow ball: __

Answer 12

Blastocoel

Question 13

The process where cells move inward to form layers: ______

Answer 13

gastrulation

Question 14

The structure that looks like a cup-shaped embryo: ______

Answer 14

gastrula

Question 15

The structure that looks like a cup-shaped embryo: ______

Answer 15

blastopore

Question 16

fertilization

Answer 16

The union of sperm and egg to form a zygote, beginning the development.

Question 17

cleavage

Answer 17

Rapid cell division of the zygote into many smaller cells without increasing its overall size.

Question 18

gastrulation

Answer 18

The reorganization of cells into three germ layers: ectoderm, mesoderm, and endoderm, which give rise to different tissues and organs.

Question 19

organogenesis

Answer 19

The formation of organs from the germ layers, leading to the development of the animal’s body structure.

Question 20

Which animal phylum is characterized by a lack of true tissues and is asymmetrical?

Answer 20

poriferia

Question 21

radial symmetry

Answer 21

Body parts arranged around a central axis, like a wheel
Sea anemones, starfish

Question 22

bilateral symmetry

Answer 22

Body can be divided into mirror-image halves along one plane
Humans, insects, fish

Question 23

cnidaria

Answer 23

radial symmetry , diploblastic

Question 24

porifera

Answer 24

multicellular, no true tissues

Question 25

nematoda

Answer 25

pesuedocoelom, round shape

Question 26

a marine biilogiust finds

Question 27

If a scientist observes an embryo with radial cleavage, mesoderm forming pouches from the archenteron, and the blastopore developing into the anus, what type of development is most likely occurring?

Answer 27

deuterostome development

Question 28

protosomes

Answer 28

the blastospore develops in the mouth

Question 29

deuterosomes

Answer 29

the blastodpores develop in the deuterostomes

Question 30

body cavities

Answer 30

Coelomate: True body cavity lined with mesoderm. Pseudocoelomate: False body cavity. Acoelomate: No body cavity.

Question 31

An animal has a body cavity with fluid-filled space between the mesoderm and endoderm, and its organs are only partially surrounded by mesodermal tissue. Which type of body cavity does this animal have?

Question 32

phyla chordata

Answer 32

Triploblastic: have three germ layers * Coelomate: have a true body cavity * Deuterostomes: mouth forms from second opening

Question 33

defining characteristic of chordates

Answer 33

notochords present during some stages of development