Notes Bio 101 Traits Are Heritable
Those individuals that reproduce more will pass their superior genes to the next
Individuals that reproduce less as a result of "poorer genes" will not pass those genes to
the next generation in high numbers.
Notes Bio 101 Natural Selection
As was noted in the introductory paragraph above
o natural selection is one of several different mechanisms that cause
evolutionary change in populations.
Natural selection produces changes in the genet
Notes Bio 101 Experiment
An experiment is a test of the hypothesis.
Experiments are useful in disproving hypotheses.
Hypotheses are not proved.
This idea will be discussed later.
To test the bird predation hypothesis, H.B.D. Kettlewell released moths of e
Notes Bio 101 DNA
Living things contain DNA
DNA contains instructions that are used by cells to produce proteins.
The vast array of different chemical reactions tha
Notes Bio 101 Living things are organized.
Cells are considered to be the smallest structure that is alive.
They are often too small to see without the aid of a microscope.
All living organisms are composed of cells.
The smallest organisms are composed of
Notes Bio 101 Ecosystems
Two processes occur in ecosystems
energy flows and is eventually lost
nutrients cycle and are not lost.
Energy flows through ecosystems and is eventually lost as heat.
Green organisms such as plants (called producers) c
Notes Bio 101 Introduction
In this chapter we will learn how living organisms change as they become better adapted
to their environment.
Over millions of years, these changes have produced a large number of different kinds of
It has been estima
Notes Bio 101Membranes
The plasma membrane surrounds the cell
Functions as an interface between the living interior of the cell and the nonliving exterior.
All cells have one.
It regulates the movement of molecules into and out of the cell
Notes Bio 101 What is Science?
Descriptive Science and Experimental Science
Scientists may be concerned with describing natural phenomena and they may limit their
investigation to describing nature.
However, they often wish to explain natural phenomena by
Notes Bio 101 The Green House Effect
The relationship between rises in concentrations of atmospheric carbon dioxide,
methane and oxides of nitrogen and the enhanced greenhouse effect
The earths mean average temperature is regulated by a steady equilibrium