WorksheetsBiology Common Entrance Revision 2
Total questions: 22
Worksheet time: 13mins
In this food chain, which organism is the producer?
frog
grass
python
eagle
Which is the secondary consumer?
frog
gasshopper
python
eagle
Toxins (poisons) can sometimes get into food chains and harm the organisms (e.g the now banned insecticide DDT). If that happened here, which organism would have the highest concentration of toxins and be most effected?
grasshopper
frog
python
eagle
What does it mean when the organisms in an ecosystem are interdependent?
They quickly become independent from their parents.
The do not need each other to survive.
They need each other to survive
The are dependent only on themselves.
What could be the first things to happen if the mice suddenly died due to a disease?
The owl population could decrease due to less food.
The number of carrots would increase.
The grasshopper population could increase as it is being eaten more by the owl.
There could be more grains as there are less mice to eat it.
Many organisms have to adapt to seasonal changes throughout the year. What are examples of seasonal change?
Amount of rain
Temperature
Amount of sunlight
Amount of food
Where in the cell do you find chromosomes (DNA)?
chloroplast
nucleus
vacuole
cell membrane
A long piece of DNA coiled up tight is called a....
chomsaoma
nucleus
gene
chromosome
What is a gene?
A long piece if DNA that holds the instructions for several characteristics.
A short section of DNA that holds the instructions for a certain characteristic, e.g. a gene for hair colour
A style of trousers.
A gene is a chromosome
In humans, fertilisation is when...
The ovum fuses with an ovum
The sperm cell fuses with a sperm cell.
The nucleus of the sperm cell fuses with the nucleus of the egg cell (ovum)
The sperm and egg cell fuse together.
In humans, what is formed when the nucleus of a sperm cell fuses with the nucleus of an ovum?
embryo
fetus
zygote
baby
What is meant by antagonistic muscles?
Pairs of muscles that work against each other; when one contracts (shortens), the other relaxes (lengthens)
Pairs of muscles that work together (when one contacts so does the other one)
Muscles that work independently of other muscles.
Muscles that work in a group of 4.
True or false, an adult human has 206 bones and around 650 muscles
TRUE
FALSE
Which muscle contracts when you bend your forearm up?
tricep
bicep
How can you test for carbon dioxide?
Turns limewater cloudy
Re-lights a glowing splint
Burns with a squeaky pop
Turns cobalt chloride paper from blue to pink
What are the products when yeast respires anaerobically?
carbon dioxide and ethanol
oxygen and ethanol
carbon dioxide and water
ethanol and glucose
What are the products when your muscles respire anaerobically (e.g. during strenuous exercise)?
carbon dioxide
water
carbon dioxide and water
lactic acid
What is the function of our skeleton?
Protection of organs
Supports the body
For movement (muscles are attached to bones)
When carrying out an experiment it is important to
Carry out the experiment only once
Change as many variables are possible
Use a large sample size
Use a small sample size
Sensitivity is...
The breakdown of food to release energy
Muscles working antagonistically
Growth after feeding
The ability to detect and respond to stimuli
Put the following letters into the correct order for preparing a microscope slide.
A – stain sample
B – adjust coarse focus control
C – adjust fine focus control
D – lower cover slip carefully onto the slide
E – place slide onto stage
F – place a small sample onto the slide
What stain should you use when viewing animal cells under a microscope?
methyl blue
methylene blue
metheelene blue
iodine
