Explain how oxygen enters the bloodstream from the lungs.
Oxygen diffuses from the alveoli into the capillaries due to a concentration gradient.
Name one type of sex cell in humans
Egg or sperm
For the body to move, most muscles that cause movement are arranged in pairs on opposite sides of a joint,These pairs are known as ---------muscles
antagonistic
What is are chloroplasts, where are they normally found and what gives them their colour?
Plant organelles where photosynthesis takes place. They are green because they contain chlorophyll. They are normally found in leaves and stems.
What does each parent contribute to their offspring during fertilisation? A) A complete set of chromosomes B) One chromosome C) Half the genetic material D) Only dominant genes
C) Half the genetic material
What would most likely happen if a primary consumer was removed from a food web?
The population of producers would increase due to reduced grazing, and secondary consumers might decline due to lack of food.
Why are food webs more stable than food chains?
Because they provide multiple pathways for energy flow; if one species is removed, others can fill its role.
Which structure in a flower produces pollen?
Anther
Where is DNA located?
In the nucleus
What is a gene? (Short answer)
Answer: A section of DNA that codes for a particular characteristic.
Arrange from smallest to largest: [Organ, Tissue, Body System, Cell]
Cell, tissue, organ, organ system
Explain why giraffes with longer necks had a better chance to survive and reproduce.
Answer: They could reach food higher in trees, giving them a better chance of survival and reproduction.
What happens to the ovule after fertilisation?
It becomes a seed
What is the role of bile in digestion?
Breaks down lipids into fatty acids
What is the main function of alveoli in the lungs?
C) Exchange gases
I am a stretchy organ. I mix food with acid to help break it down. What am I?
Stomach
Which blood component is responsible for carrying oxygen?
Red blood cells
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