Variables
What must be included in a testable experiment?
variables - independent & dependent (manipulated change & response)
This is the name of the largest category within the classification system. This category is based on the fundamental differences in their cellular structure and genetic makeup
Domains
This is the basic unit of all living things; some organisms are made of just one, while others have trillions.
Cells
True or False:
Relying on the correct environmental conditions to maintain homeostasis is exothermic
True
These were the earliest life forms on Earth, first appearing in the oceans around 3.5 billion years ago.
single-celled organisms (or bacteria/prokaryotes)
In an experiment, this is the variable that the scientist intentionally changes or manipulates.
independent
List the 6 kingdoms of life
protista
animalia
plantae
fungi
eubacteria
archaebacteria
This characteristic of life is demonstrated when a plant leans towards a sunny window or you shiver in the cold.
responding to the environment (Stimuli)
autotrophs: produce their own food through photosynthesis
heterotrophs: need to consume their food
This supercontinent, which included all of Earth's major landmasses, existed during the late Paleozoic and early Mesozoic eras.
Pangea
If you were testing how the amount of sunlight affects plant growth, this is the variable you would measure to see the effect.
the dependent variable (plant growth)
What is the main difference between domain bacteria and domain archaea
cell structure
This process is how living things make more of their own kind, ensuring the continuation of their species
reproduction
List at least 2 purposes water serves, as it is a necessity for life.
1. obtaining chemicals from their surroundings
2.move substances within their bodies
3. aid in reproduce
4. helping to maintain homeostasis
This process, first performed by ancient cyanobacteria, uses sunlight, water, and carbon dioxide to create food and release oxygen as a byproduct.
Photosynthesis
To ensure a fair test when investigating the effect of fertilizer on plant height, this is what you would do with the amount of water given to each plant.
keeping it the same (making it a controlled variable)
Which two descriptions are not true about the Kingdom Plantae?
-They are heterotrophic, meaning they obtain nutrients from other organisms.
-They are autotrophic, meaning they make their own food.
-Most are multicellular.
-Their cells have cell walls.
-Their cells are prokaryotic.
-They are heterotrophic, meaning they obtain nutrients from other organisms.
-Their cells are prokaryotic.
The sum of all chemical reactions in an organism that build up or break down materials is known as this.
metabolism
"Living space" is a requirement of life.
What is a scientific/ecology term we can use to describe "the natural home or environment of an animal, plant, or other organism"
Habitat
The extinction of the dinosaurs at the end of the Mesozoic Era allowed for the rise and diversification of this group of animals.
Mammals
A student wants to find out if the color of a t-shirt affects how much it heats up in the sun. The dependent variable in this experiment is the t-shirt's temperature. Name one important controlled variable.
the amount of time in the sun, the type of fabric, or the size of the t-shirt
Which domain of life contains multi-cellular organisms
Eukarya
This is the maintenance of a stable internal environment, such as regulating body temperature or blood sugar levels.
homeostasis
If an area does not provide an organism with all that it needs to survive then two actions can occur?
1. migration
2. population die off
This event, which happened about 541 million years ago, marks a period when most major animal groups started to appear in the fossil record.
Cambrian Explosion