Lab 6 Shapes Of Animals Flashcards Preview

organismal Biology > Lab 6 Shapes Of Animals > Flashcards

Flashcards in Lab 6 Shapes Of Animals Deck (30):
0

What are organs?

Structures in bodies of organisms that perform specific, life sustaining functions.

1

What do the stomach & intestines do?

Facilitate feeding & digestion

2

What do the heart & blood vessels do?

They circulate materials throughout the body

3

What do the lungs do?

Supply oxygen to body

4

What do the kidneys do?

Remove toxic substances

5

What organs do jellyfishes not have?

Heart & blood vessels

6

What structures are not in a tapeworm?

Digestive

7

What structures are not in a round worm?

Respiratory organs

8

In animals, what process produces gametes?

Meiosis

9

What is a ratio?

A comparison of one quantity to another quantity

10

Sexual life cycles of microorganisms, fungi, & plants are of 2 principle types

1. The haploid life cycle
2. Alternation of generations

11

What are life cycles characterized by?

Where mitosis occurs

12

What sexual life cycle are most animals characterized by?

Diploid sexual life cycle

13

What is the step by step process of sexual reproduction?

1. Sperm penetrates egg
2. Embryonic development
3. Birth
4. Growth
5. Larval development & metamorphosis (in most species
6. Aging
7. Death

14

What is morphogenetic cell movements?

Converting the fertilized egg into a mature animal.

15

What major group of marine animals do starfish, sea urchins, & & sand dollars belong?

Echinodermata

16

How do Echinoderms reproduce?

They release both sperm & eggs into the environment so that fertilization & development can occur external to the adult organism

17

What color are developing embryos?

Essentially transparent.

18

Why is yolk?

Stored food

19

What are isolecithal eggs?

Eggs with a small amount of yolk that is evenly distributed throughout the cytoplasm

20

What are the stages of cleavage?

1. Unfertilized egg
2. 2 celled embryo
3. 4-celled embryo
4. 8-celled embryo
5. Morula
6. Blastula
7. Early gastrula
8. Late gastrula
9. Late gastrula

21

Identification of unfertilized egg

Single large nucleus containing a prominent nucleolus

22

2 celled organism

Establishes left & right sides of the animal

23

4- celled embryo

Establishes anterior & posterior ends of the animal

24

8-celled embryo

Establishes dorsal & ventral halves of the animal.

25

What is the morula?

Solid grape like cluster of cells

26

What is the embryo composed of in blastula stage?

Single layer of cells which surrounds a fluid filled space

27

What is a blastocoel?

A fluid filled space in an embryo in the blastula stage

28

What is the vegetal hemisphere

The side of the blastocoel with larger cells

29

What is the animal hemisphere?

Side of the blastocoel with smaller cells