Cells & Anatomy
In which part of the digestive tract do most of the chemical digestion and absorption of food occur?
Small intestine
What happens to most of the energy when it passes in a food chain?
it is lost from the system as heat
What is the major cause for air pollution?
factories
What is the term for a scientific name of an organism made up of two Latin names?
Binomial nomenclature
These are different digestive secretions:
I- Secretion of enzymes
II- Secretion of saliva
III- Secretion of stomach juice
Which one directly causes the breakdown of nutrients chemically in the human intestine?
I
What converts nitrogen gas into a usable form for plants?
some microorganisms
Why is soil erosion bad?
no plants grow after it
What is the term used to describe the number of organisms in a population dying each year?
Death Rate
The liver is involved in the detoxification of many poisons and drugs. In which organelle does this process primarily take place?
smooth ER
The diagram shows the part of the carbon cycle. What are the processes X and Y?
Photosynthesis | Respiration
Which greenhouse gas is released from factories and by herbivores (plant eating animals)?
carbon dioxide
Let's consider two species: Wolf (Canis lupus) and Cat (Felis domesticus). These species definitely belong to different …
Genera
Figure shows the structure of an animal cell. Select the organelle(s) which consist(s) of two subunits: large and small subunits.
A
Consider the food chain: grass -> grasshopper -> mouse -> snake -> hawk. What percentage of energy in the grass (100%) is expected to pass to the hawk?
0.01% (10% rule: 100% -> 10% -> 1% -> 0.1% -> 0.01%)
Caterpillars are destroying the tomato garden. What could be used to protect tomatoes?
Insecticide
Why might global warming lead to the extinction of many amphibian species?
These animals need water to reproduce
Figure below shows a cross section of a leaf taken using an optical microscope with a magnification of x250. Use the information provided to calculate the actual length of a palisade cell, as marked by line A on Figure. Give your answer in µm.
80 µm (2 cm = 20,000 µm. 20,000 / 250 = 80 µm)
Shagan, in Semey, had a population of 1,100 individuals. They had a birth rate of 132 in one year, a death rate of 88 in one year, and an emigration (individuals leaving the population) rate of 22. How Shagan's population is changed in one year?
+22 (132 - 88 - 22 = 22)
What might happen if all farmers stopped using pesticides?
there will be fewer fruits and vegetables, which will lead to higher prices for them
A lysosome measures 0.4 µm in diameter. What is the diameter in nm?
400 nm