Unit 1
What model represents an atom with spheres, or balls. The balls are connected to each other with bars, or sticks. The sticks represent how the atoms are bonded to each other.
The ball-and-stick model
What is the thin outer covering that surrounds the body of a cell.
Cell membrane
What does DNA look like?
DNA consist of four possible different parts, joined together in pairs and linked end to end to form a long twisted chain.
On the Origin of Species.
When organisms maintain a stable environment within their cells and bodies, it is called what
homeostasis
In weather observation what purpose to radiation censors perform?
They determine presence and strength of radiation.
What is an organism that consists of a single cell.
unicellular organism
How many sets of chromosomes does cotton have?
4 sets.
What is a process that selects traits that help an animal to survive and produce more offspring.
Natural Selection
An what is any species that moves to, or is brought to, a new environment and competes with the native species for resources.
Invasive species.
What describes a quantity of what's being observed and what describes a quality of what has been observed.
Quantitive observation, and qualitive observation.
What type of cell has a nucleus and other membrane-bound organelles?
Eukaryotic cells
When two parent genotypes are known, it is possible to figure out the likelihood of their offspring’s genotypes and phenotypes. Probability is used to help discover characteristics of the offspring. Scientists often use a tool called (what) to determine all possible outcomes.
Punnett square
What are changes in the DNA of an organism. This directly affects what proteins are produced from the DNA, and thus changes an organism’s traits.
Mutations
One of the most common adaptations for pollination is pollen that can be spread by the wind. Pollen produced by the plants is spread around by wind. By chance, some of the pollen will land on a flower of another plant and pollination will occur. Plants that rely on wind produce large amounts of small, lightweight pollen. This increases the chances of pollen landing on a flower belonging to what
The same species