Unit 1 - Life (INTRO)

Question 0

8 levels of biological organization (+ which levels are considered “living”)

Answer 0

1. Organism
2. Organ System
3. Organ
4. Tissue
5. Cellular (all up to here are living)
6. Organelle (mitochondrion, chloroplast, etc)
7. Atomic (non-living)
8. Subatomic (non-living)

Question 1

The 6 characteristics of living things

Answer 1

1. Complex + made of cells
2. Respond to stimuli
3. Obtain + use energy
4. Grow + develop
5. Reproduce
6. Evolve

Question 2

Homeostasis

Answer 2

The tendency of a system to maintain inner stability and coordinate an inner response to a stimulus that would disturb its normal condition/function.

(EX. Temperature, blood sugar level, water level abnormalities induce homeostasis)

Question 3

What is energy and what supplies it (give 2 examples of processes that result in acquired energy)

Answer 3

Energy: the ability to do work
Food supplies the organism with material and energy (for movement and self-reparation)

EX. Photosynthesis + cellular respiration

Question 4

What are plants in terms of how they acquire their energy?

Answer 4

Phototrophic Autotrophs

Question 5

What are most other organisms (EX. animals) in terms of how they acquire their energy?

Answer 5

Chemotrophic Heterotrophs

Question 6

Tell me about the growth and development of living things

Answer 6

It violates homeostasis (“staying the same”), the organism grows in size or mass, and growth and development is genetically programmed (timing, size, shape)

Question 7

Heredity

Answer 7

The passing of genes from parent to offspring

Question 8

Tell me about the evolution of living organisms

Answer 8

It’s the change of genetic composition in a population, natural selection selects the most “advantageous” genes.
The more time, the more change.

Question 9

Well adapted forms of live can survive for many millennia in ________

Answer 9

Stable environments (ex. Oceans)
("Living fossil" = shark)

Question 10

A species must adapt to new conditions or else it faces extinction in _______

Answer 10

Unstable environments (ex. The dinosaurs 65 mybp)