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Multiple choice
Matching
Missing words
Cells
Long questions
100
DNA stands for?
A) Deoxyribo - nucleic - acid
100
An example of groundwater
Aquifer
100
1. ___________ is a chemical added to water to kill bacteria.
Chlorine
100
What are the four stages of Mitosis - in order?
Prophase , metaphase, anapahse and telophase
100
What do we call the union between the egg and the sperm?
Fertilization
200
Mitosis takes place in?
A) Body cells
200
The formation of offspring from parent
Reproduction
200
2. Petroleum is extracted from beneath the ocean through _______________.
Offshore oil rigs
200
Name three things that are in a plant cell but not in an animal
Chloroplast, cell wall and a large vacuole
200
Name the 3 phases of the water cycle seen in the diagram
evaporation, condensation and precipitation
300
Crossing over takes place in...
d) Both B and C - Prophase 1 of Meiosis and Only in Meiosis
300
It is when water changes from liquid to water vapor.
Evaporation
300
3. At the end of meiosis there are _______ cells that are genetically different
Four
300
Which part Controls what the cell does?
Nucleus
300
Label the ocean floor
Continental shelf, continental slope, abyssal plane
400
Currents are caused by ....
a ) Wind, gravity, solar heating and the earths rotation
400
It is the process by which reproductive cells divide.
Meiosis
400
4. A __________ is formed in the ocean when tectonic plates collide
Trench
400
Which part Controls what goes in and out of the cell?
Cell memebrane
400
Why do we use new microscopes to see DNA?
Because new microscopes have a higher magnifying power and allow us to see greater detail
500
It is the process by which water evaporates from the leaves.
Transpiration
500
5. A _________ breeze is formed when land cools faster than the ocean water.
land breeze
500
Which part Jelly like substance that holds organelles in place
The cytoplasm
500
2. Why should reproductive cells have half the number of chromosomes compared to body cells?
Reproductive cells have 23 chromosomes because when the sperm and egg unite to form a zygote, the maximum amount of chromosomes a zygote can have is 46 chromosomes