🔬 Cells & Classification
What is the basic unit that makes up all living things?
A cell
What system gives your body support and protects many of your organs?
The skeletal system
What part of a plant usually absorbs water and minerals from the soil?
Roots
What is a characteristic that can be passed from parents to offspring called?
A trait
What do we call all the living and nonliving things interacting in an area?
Ecosystem
What part of the cell contains the genetic material and controls many cell activities?
Nucleus
What system allows your body to move by contracting muscles?
Muscular system
Is a bird a vertebrate or an invertebrate?
Vertebrate
What molecule contains the genetic instructions for living things?
DNA
In the food chain grass → rabbit → fox, which organism is the producer?
Grass
Why do scientists classify organisms into groups?
To organize living things and make them easier to study/identify
What two body systems work together to bring oxygen into your body and remove carbon dioxide?
Respiratory and circulatory systems
What process do plants use to make their own food using sunlight?
Photosynthesis
What are genes?
Sections of DNA that contain instructions for traits/proteins
What is an adaptation?
An inherited characteristic that helps an organism survive and reproduce in its environment.
What happens when a cell reproduces by dividing into two cells?
One cell divides to form two new cells.
What system breaks food down so your body can absorb nutrients?
The digestive system
What is one major difference between seed plants and seedless plants?
Seed plants reproduce using seeds; seedless plants reproduce without seeds.
Why might two siblings look different even though they have the same parents?
They inherit different combinations of genes/traits from their parents.
A population of rabbits lives in an area where their main food source disappears. What will most likely happen to the rabbit population?
It will decrease.
Name one major difference between a plant cell and an animal cell.
Plant cells have a cell wall and chloroplasts; animal cells do not.
Your heart is beating faster while you exercise. Why does your body need to increase blood flow?
Working muscles need more oxygen and nutrients, and they need wastes such as carbon dioxide carried away
Name three groups of vertebrate animals.
Mammals, birds, reptiles, amphibians, fish. (Any three)
If a parent has brown eyes and a child has brown eyes, does that prove the child inherited the exact same genes from the parent?
No. The child receives a combination of genes from both parents.
Why might a population of insects become resistant to a pesticide after many generations?
Some insects may already have traits that make them resistant. Those insects survive and reproduce, making resistance more common over generations.