Homeostasis means

The work of scientists begins with

Hypotheses may arise from

A controlled experiment allows the scientist to isolate and test

Scientists publish the details of important experiments so that

A well-tested explanation that unifies a broad range of observations is a(n)

All of the following are characteristics of all living things EXCEPT

What is the term for a group of organisms of one type living in the same place

In the metric system, the basic unit of length is the

Which is not a unit of measurement in SI?

An instrument that allows light to pass through a specimen and uses two lenses to form an image is a(n)

What is the term given to a group of cells that develop from a single original cell?

What technique is used to separate the different cell parts?

Safety procedures are important when working

The information gathered from observation is called

The smallest units that are considered to be alive are called

The device used to view microscopic images which shines a beam of electrons through a thin specimen is called a(n)

The instrument used to separate cell parts is called a(n)

What number does the prefix kilo- represent?

a complex of terrestrial communities that covers a large area and is characterized by certain soil and climate conditions and particular assemblages of plants and animals

dense covering in the leafy tops of trees

layer in tropical rainforest of shorter trees and vines

layer of permanently frozen subsoil

biological influences on organisms within an ecosystem

physical nonliving factors that shape ecosystems

area where an organism lives

interaction in which one organism captures and feeds on another organism

relationship in which one organism lives on or inside another and harms it

the scientific study of the interactions among organisms and between organisms and their environment

contains the combined portions of the planet in which all of life exists

a group of organisms so similar to one another that they can breed and produce fertile offspring

groups of individuals that belong to the same species and live in the same area

Assemblages of different populations that live together in a defined area

a collection of all the organisms that live in a particular place together with their physical environment

a group of ecosystems that have the same climate and similar dominant communities

the day to day conditions of Earth's atmosphere

the average year-after-year conditions of temperature and precipitation in a particular region

area of Earth where the sun is directly overhead at noon all year

organisms that can produce their own food

also called an autotroph

organisms that consume other organisms

another term for heterotroph

organisms which only eat plants

organisms that only eat animals

organisms that eat both plants and animals

a series of steps in which organisms transfer energy by eating and being eater

links all the food chains in an ecosystem together

The basic units of living organisms

device using a series of lenses to magnify objects in steps. Can magnify up to 1500 times

Uses a beam of electrons to magnify structures up to 500,000 times. Can only view the surface of structures.

Microscope that can magnify images up to 500,000 x's and can view organelles and molecules by using a beam of electrons

Scientist who used a compound light microscope to view cork bark and is credited with the term "cells"

Scientist credited with the idea that all plants were composed of cells.

Scientist credited with the idea that all animals were composed of cells.

Specialized structures inside a cell that perform specific functions.

Cells that do not have a membrane around their genetic material (DNA) or any membrane-bound organelles

the control center of the cell; letter B in diagram

where the assembly of ribosomes begins; letter C in diagram

make proteins for the cell; # 3 in diagram

Site where lipid components of the cell membrane are assembled; highway of the cell # 8 in diagram

portion of the ER involved in the production of proteins; # 5 in diagram

modifies, sorts & packages proteins and other materials from the ER; # 6 in diagram

small organelle filled with digestive enzymes; #12 in diagram

sac-like structures for storage; # 10 in diagram

converts chemical energy stored in food into compounds that are more convenient; powerhouse of the cell; #9 in diagram

captures sunlight and converts it into chemical energy; letter E in diagram

network of protein filaments that help the cell maintain its shape;

located near the nucleus and help organize cell division #13 in diagram

regulates what enters and leaves the cell; letter A in diagram

provides support and structure in plants, algae, fungi and prokaryotes; letter G in diagram

Which structure is a glycolipid?

Which structure is a glycoprotein?

Which structure is a carbohydrate?

Which structure is a receptor protein?

Which structure is cholesterol?

Which structure is a protein channel?

Which structure is a phosphate head?

The line from H to I represents (select any that are correct)

Which letter represents a fatty acid tail?

Which letter represents a phospholipid?