Bio Quiz Unit 1

8 characteristics of living things

• Cells

• DNA

• Growth & Development

• Obtain & use materials and food for energy

• Maintain homeostasis

• Responds to environment

• Reproduces (sexual and asexual reproduction)

• Evolve as a group (species)

Observation

Things you can see

Hypothesis

Educated guess based on observations

Quantitative data

numerical data, ex:105 degrees

Qualitative data

non-numerical data, ex: hot

Control group

The group that isn’t treated in the experiment, compared to the experimental group

Independent variable

Variable that you change

Dependent Variable

Variable that changes based on the independent variable

Control variables/conditions

things that stay the same

Cells

Smallest unit of life

Unicelluar

Bacteria made up of 1 cell

Multicelluar

Bacteria made up of 2 or more cells

Prokaryotic Cells

Does not have a nucleus or membrane-bound organelle

Eukaryotic cells

Contains a nucleus and a membrane-bound organelle

DNA

Responsible for holding the gentic code in each living organism

Growth and Development

Basic traits from parents that do not change

Obtain and use materials for ____

energy

Maintain homeostasis

Maintain stable internal conditions

Responds to enviornment

stimulus

Asexual Reproduction

• Organism has a single parent -> same cell as parent

Sexual reproduction

Two parents reproduce -> a new cell is formed from the combined cells of parents

• Evolve as a group (species)

An organism that changes over a long period of time

• Living organisms utilize materials and energy through chemical reactions. The combination of all chemical reactions of a living organism is ____

• Metabolism

What is a model?

simplified representation of a real world thing, used to help show data

• What are the benefits of a sample count vs. a total count?

• Sample count = faster and cheaper

• Total count = more accurate

Why do we value biodiversity?

We value biodiversity because of the benefits it has for us and other living things. Biodiversity refers to the diversity of life, encompassing plants, animals, and other living organisms. For example, it provides us and other animals with food, which is crucial for our survival.

• Elephants as ecosystem engineers

• Play a large role in seed dispersal, as their poop contains seeds that act as fertilizer -> spread plant populations

• Dig water holes -> crucial water sources for other animals

• Seed dispersal and the importance of animals as seed dispersers

• Seed dispersal = movement of seeds away from the parent plant -> crucial to the survival of the plant

• Animals like elephants help spread the seeds by eating the plants and dispersing the seeds in another place in their poop

• Microscopes - what is the magnification? 

The process of making an object appear larger than its actual size is used to observe cells that we can’t see regularly

• How do microorganisms move?

• Microorganism = microscopic organism

  • Ex: bacteria, fungi, viruses

• Flagellum movement

  • Rotation of the filament allows bacteria to move around in their environment