7th grade science review

Question 1

Microscopic Organisms

Answer 1

Microscopic Organisms are organisms that can not be seen with the naked eye.

Question 2

Define prokaryotic and Eukaryotic

Answer 2

Prokaryotes are always unicellular, while eukaryotes are often multi-celled organisms. Additionally, eukaryotic cells are more than 100 to 10,000 times larger than prokaryotic cells and are much more complex.

Question 3

Cell wall vs. Cell membrane

Answer 3

Cell wall: surrounds the plant cell and gives it shape
Cell membrane:

Question 4

Cytoplasm

Answer 4

Cytoplasm is the gelatinous liquid that fills the inside of a cell.

Question 5

Nucleus

Answer 5

The control center of the cell.

Question 6

Chromosomes

Answer 6

A structure found inside the nucleus of the cell. Contains the cell that controls the cell: transmits hereditary characteristics.

Question 7

Mitochondria

Answer 7

Releases energy from digested foods.

Question 8

Chloroplasts

Answer 8

Provides the plant with food through the process of photosynthesis.

Question 9

Golgi bodies

Answer 9

Packages and transmits cellular material throughout the cell.

Question 10

Vacuole

Answer 10

Stores food, water, and other cellular material.

Question 11

Endoplasmic Reticulum

Answer 11

Place where materials are processed and moved around inside the cell.

Question 12

Plant vs. Animal cells

Answer 12

Similarities: Both have cell-membranes, mitochondria, and vacuoles.
Differences: Only plant cells have cell-walls, and chloroplasts.

Question 13

Skeletal System

Answer 13

Provides the human body with protection and support. Helps with body movement.

Question 14

Muscular System

Answer 14

Helps move the body and materials through the body. Composed of cells called muscle fibers.

Question 15

Circulatory System

Answer 15

Provides oxygen, nutrients and hormones to muscles, tissues and organs throughout your body.

Question 16

Respiratory System

Answer 16

Helps you breathe. Helps exchange gasses (oxygen and carbon)

Question 17

Excretory System

Answer 17

Removes metabolic wastes from the body.

Question 18

Digestive System

Answer 18

Converts food into nutrients, that the body uses later as fuel for energy.

Question 19

Nervous System

Answer 19

Collects, processes, and responds to information using electrical signals.

Question 20

Endocrine System

Answer 20

Regulates cells and organs using chemical substances called hormones.

Question 21

Gregor Mendel

Answer 21

Scientist who helped develop the idea of genetics in the mid 19th century.

Question 22

Punnett squares

Answer 22

https://www.google.com/imgres?q=punnett%20square&imgurl=https%3A%2F%2Fupload.wikimedia.org%2Fwikipedia%2Fcommons%2F4%2F4e%2F2924_Mendelian_Pea_Plant_Cross.jpg&imgrefurl=https%3A%2F%2Fopengenetics.pressbooks.tru.ca%2Fchapter%2Fpunnett-squares-31-ratio%2F&docid=PgX2GnmZIeaRYM&tbnid=I9xV5p-NQJOoJM&vet=12ahUKEwiI9eiAssKFAxX75skDHQPFB34QM3oECGYQAA..i&w=1309&h=1101&hcb=2&ved=2ahUKEwiI9eiAssKFAxX75skDHQPFB34QM3oECGYQAA

Question 23

Genotype

Answer 23

The genetic material letters that make up an individual.

Question 24

Phenotype

Answer 24

The physical traits or a particular trait.

Question 25

Dominant and Recessive

Answer 25

Dominant = CAPITAL LETTERS Recessive = lowercase letters

Question 26

Homozygous and Heterozygous

Answer 26

Homozygous = same letters Heterozygous = different letters

Question 27

Asexual Reproduction

Answer 27

When only one parent has an offspring, the offspring will only have traits from the one parent.

Question 28

Sexual Reproduction

Answer 28

When two parents produce an offspring, the offspring will have a combination of traits acquired from both the parents.

Question 29

Define Biomes

Answer 29

Biomes are large geographic regions that are distinguished by the climate.

Question 30

Identify the 6 types of Biomes

Answer 30

1. Tundra 2. Taiga 3. Temperature (deciduous) forest 4. Tropical rain forest 5. Greenlands 6. Desert