Biology 1408 Chapters 1,2,3
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Biology 1408 Chapters 1,2,3
Biology 1408 Chapters 1,2,3,
The main difference between an autotroph and a heterotroph is...
how they obtain energy
The basic difference between a prokaryotic cell and a eukaryotic cell is that the prokaryotic cell
lacks a nucleus
In evolutionary terms, which cell listed is considered to be most primitive?
Which correctly indicates the sequence of increasing organization?
cell, tissue, organ, organ system
A typical animal would be characterized by all of the following EXCEPT
All of these are true
We use the scientific method every day. Imagine your car doesn't start one morning before school. Which of these is a reasonable hypothesis regarding the problem?
I'm out of gas
You observe a plant on your windowsill that is growing at an angle toward the outside. This is an example of a living thing
responds to stimuli
A carefully formulated scientific explanation that is based on a large accumulation of observations and is in accord with scientific principles is termed a/an
Which is NOT an example of evolution?
A dog learns how to open the cabinet where its food is kept.
A mutation is...
a change in DNA sequence
What is the maximum number of covalent bonds an element with atomic
number 8 can make with hydrogen?
What is the difference between covalent bonds and ionic bonds?
Covalent bonds involve the sharing of electrons between atoms; ionic bonds involve the electrical attraction between atoms
How does one explain the formation of ions?
gain or loss of electrons
If a substance measures 5 on the pH scale, that substance
has greater concentration of H+ than OH-
Which of the following would be least affected by the presence of water?
a nonpolar covalent bond
Which of the following represents a molecule characterized by polar
Phosphorus has an atomic number of fifteen, so what will be the distribution of its electrons?
The first energy level will
have two, the second will have eight, and the third will have five.
Why is a neon atom (Atomic #10) more stable than a nitrogen atom (Atomic #7)?
Eight electrons completely fill its outermost electron shell.
What determines the cohesiveness of water molecules?
A substance with specific properties that cannot be broken down or converted to another substance is a(n)
Which of the following BEST summarizes the relationship between dehydration reactions
Dehydration assembles polymers, hydrolysis breaks down
Of what are fats composed?
3 fatty acids, and 1 glycerol
Which of the choices is a monosaccharide found in DNA?
Organisms contain thousands of different proteins composed of ________ different amino
Which of the following may possess primary, secondary, tertiary and quaternary
Which of the following macromolecules possess large nonpolar regions making them
insoluble in water?
Phospholipids are unusual and important to cell structure because…
they have a polar and non polar end
A nucleotide is...
Phosphate, sugar, base
Chitin in an example of a ______.
When a hydrolysis reaction breaks down the disaccharide sucrose, what two monosaccharides are produced?
Glucose and fructose