Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key


Play button


Play button




Click to flip

72 Cards in this Set

  • Front
  • Back
  • 3rd side (hint)
List the seven characteristics of living organisms
1. composed of cells
2. respond to stimuli from the environment
3. actively maintain homeostasis
4. get matierals and energy from their environment and convert them to matter
5. grow
6. reproduce (with DNA)
7. have the capacity to evolve
units of heredity that provide the information needed to control the life of the cell, and organelles
specialized to carry out specific functions such as moving the cell, obtaining energy, or synthesizing large molecules
What are cells surrounded by? What do these boundaries protect?
thin plasma membrane; cytoplasm
What type of stimuli do organism respond to?
internal and external
the maintenance of a relatively constant enviroment required for optimal functioning of cells
What is an example of homestasis?
brain and heart are always kept the same temperature
List four regulatory systems that homeostasis maintains
resiratory, endocrine, circulatory, and excretory
List four places where organisms aquire nutrients from?
water, soil, air, and other organisms
Nutrients(what they are needed for)
a substance aquired from the enviroment and needed for survival, growth, nd developement
List four tpes of nutrients
minerals, oxygen, water, and other chemical building blocks
List four external stimuli that organisms respond to
ligt, touch, sound, and chemicals
List four internal stimuli that organisms respond to
stretch, pain, temperature, and other chemicals
List three reasons why organisms need energy and materials
growth, maintenance of homestasis, and reproduction
the capacity to do work
Where does the energy that sustains all life come from?
the sun
List two types of autotrphs
plants and unicelled organisms
Autotrphs capture their energy through what process?
List two types of heterotrophs
animals and fungi
How do heterotrophs aquire their energy?
from other organisms
the conversion of materials aquired from the enviroment into the specific molecules of the organisms body
Whta process causes the genetic makeup of a population to change?
natural selection
material substance that occupies space, has mas,, and is composed entirely of atoms; what a physical substance is made of
the broadest category for classifying organisms: Bacteria, Archaea,and Eukarya
the second broadest taxonomic category contained within a domain and consisting of related dimensions
refferin to the cells of the domain Bacteria and Archaea
reffering to cells of the organisms of the domain Eukarya
List the eleven levels of organization
3. community
4. population
5. multicellular organisms
6. organ system
7. organ
8. tissue
9. cell
10. molecule
11. atom
two or more populations of different species living in the same area
members of one species living in the same area
Organ System
two or more organs working together to do one bodily function
a structure usually composed of several tissue types that form a functioning organism
a group of similiar cells that perform a specific fuction
combination of atoms (ex. H2O)
the smallest particle of an element that retains the properties of the element
List the four resources organisms need to live and why they are needed
Nutrients to contruct tissue, enery to power metabolism, liquid to serve as a solvent, and appropriate temperatures to live
Metabolic activities
chemical reactions that take place within our body
Why are the four resources unevenly distributed over the Earth
certain organisms can't survive in the environments where the resources are located
As the amount of the four resources in different places around the world, what else varies?
temperature, availability of water, light, and nutrients
Terrestrial biomes are dominated and defined by what?
their plant life
large land areas with similiar environmental conditions and characteristic plants and communities
List a rain forest biome temperature expectation
hot humid climate
Which biome has the largest diversity of organisms?
tropical rain forest
the biological richness of an ecosystem; the total number of species within and ecosystem and the resulting complexity of interactions among them
What percentage of the Earth do rain forests cover?
What percentage of Earth's species does the rain forest contain?
Why is edible plant material close to the ground scarce?
tall trees capture the sunlight which leaves little light and energy for ground plants
tree dwelling
How can the rain forest's rich collection of organisms be supported by such infertile soil?
all the nutrients are in the vegetation
Why is rain forest soil unsuitable for agriculture
infertile soil and heavy rains
What happens to rainforest soil when the trees are cut down?
soil becomes depleted, impenetrable, and bricklike
What percentage of the rain forest have himans already destroyed?
How can human destruction of rain forests be stopped?
creation of protected preserves, and consrvation efforts
Sustainable Use
deriving benefits from an ecosystem in a manner that can be sustained indefinately
Define Abiotic and list three examples
nonliving; soil, water, and weather
Define Biotic and list a general example
lving; all living things
an autotroph(photosynthetic)
a heterotroph
Detritus Feeder
an organism that lives off the remains or waste of other organisms
an organism that digests organic materials by freeing nutrients into the environment
Where are snow leopards primarly found
high rugged mountains in Central Asia
Wher is the majority of the snow leopard population found
What are the habitats that SL live in like
cold, dry temperatures with little or no vegetation
When to cubs first open their eyes?
one week old
What happens when cubs are two months old?
eat their first solid food
What happens at three months of age?
begin to hunt and learn to survive
What age do cubs become independent of their mothers?
18-22 months
What age are female snow leopard ready to breed? How often do they breed?
2-3 years; once every other year
How long do snow cats live?
10-13 yrs
List five reasons why snow leopard are endangered
1. hunted for their fur
2. hunted for their bones: part of traditional Asian medicine
3. kill livestock and are thus killed
4. hunted for meat
5. hunted for prizes