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Biology

Intro to Bio

QuestionAnswer
approximately how long ago did life arise on earth 3.5 million years ago
describe the first organisms single celled
organisms change, or ___, over long periods of time evolve
Today, millions of ____ of organisms exist on earth. species
The _____ is the basis unit of life and makes up all _____ cell, organisms
What is true about the size of most cells? small and highly organized
Specialized structures in cells are called what? organelles
what surrounds all cells? plasma membrane
all cells must contain a set of ______ instructions or DNA genetic
organisms maintain stable internal condition called homeostasis
name 3 things that organisms must keep stable or balanced temperature, water content, chemical content
for a species to contnue, some of its members must be able to ______ and pass on their traits to their ________ reproduce, offspring
What does DNA stand for? Deoxyriubonucleic Acid
DNA's instructions are called ____ and code for the complex ____proteins necessary for life genes, proteins
_______cells or body celles each have a full set of _____ DNA or hereditary material somatic, DNA
________reproductions combined hereditary information from __ parents sexual, 2
When an sperm and egg join, a fertilized egg or _______ forms and contains DNA from ______ parents. zygote, both
in ____ reproduction, only a single parent cell reproduces and the new cells are genetically _____ to each other and the original cell. asexual, identical
_____, not individual organisms, change of evolve over many generations populations
______is the driving force for evolution Natural Selection
according to natural selection, which indivduals in a population are more likely to survive and be able o reproduce? ones with favorable traits
a change in population due to the survival and reproduction or organisms with favorable traits is known as what? natural selection
define ecology interactions of organisms with one another and with their environemtn
name 3 things organisms need from their nvironment nutrients, water, and gasses
Created by: sportslover7898
 

 



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