Chpter 1 Biology

What are proteins made of?

Amino Acids

all of the chemical reactions that occur within cells

Metabolism

What is photosynthesis used by?

plants ,algae, and some bacteria

A constant internal environment.

Homeostasis

Homeostasis would be impossible to maintain
without the ability to respond to stimuli.

True

external stimuli

remove one’s hand from a hot stove.

internal stimuli

adjustments to blood pressure in response to values outside of normal.

increase in size and in the number of cells.

Growth

all changes that occur from fertilization until death.

Development

DNA

genetic information of all life.

genes

short segments that specify traits, makes up DNA.

Mutations

variations in genes.

Evolution

How a population changes overtime.

Adaptation

over time, population has more
individuals with this advantageous variation

Nucleus

a central core or control center found in various contexts, most commonly as the genetic storehouse inside a living cell or the dense center of an atom.

All life is classified into one of three domains:

Bacteria, Archaea, Eukarya.

Bacteria and Archae contain

prokaryotes - single-
celled organisms that lack a nucleus.

Eukaryotic cells contain

A nucleus. Some eukaryotes are single-celled, some are multicellular. (like Humans.

The domain Eukarya is divided into how many kingdoms

Four

What are the Eukarya kingdoms

Plants (Plantae).
Fungi (Fungi).
Animals (Animalia).
Protists (Protista).

In order for something to be a hypothesis…

It has to be tested

Scientific theory

accepted explanations for how the world works.

Law, or principle

accepted by an overwhelming majority of scientists.