Semester Exam Flashcards
Homeostasis
Maintaining a stable internal condition.
The work of scientists begins with…
observations
Controlled Experiment
One variable is changed at a time.
How does science differ from other disciplines?
Can be tested and proved.
When is a hypothesis useful?
When it is testable.
Where may a hypothesis come from?
Prior knowledge, observations, etc.
Spontaneous Generation
The idea that life could arise from nonliving matter.
What is not a goal of science or how science works?
Something that can’t be proven.
Inference
Logical interpretation of data based on prior knowledge.
Why do scientists need to publish the details of important work?
So their work can be repeated and further tested.
What is a tissue composed of?
individual cells
Theory
well-tested hypothesis
Osmosis
Diffusion of water through a selectively-permeable membrane like the cell membrane.
Biology
study of life
Ribosomes
Small particles of RNA and protein found throughout the cytoplasm.
Chromosomes
Thread-like structures contain the genetic information that is passed from one generation of the cells to the next. Characteristics of the cell.
Cell Wall
Strong layer around the cell membrane
Cell Membrane
The gatekeeper to the cell.
Characteristics of living things are?
Made of cells, grow and develop, based on universal genetic code, obtain materials and energy, reproduce, respond to their environment, and maintain a stable internal environment.
Nucleus
Brain of the cell.
Metabolism
Chemical reaction in which an organism breaks down it’s food.
Goal of Science
Investigate and understand the natural world, to explain events in the natural world, and to use those explanations to make useful predictions.
