BIOLOGY PROCTORED EXAM PENN FOSTER WITH QUESTIONS AND WELL VERIFIED ANSWERS [GRADED A+] REAL EXAM 100%

BIOLOGY PROCTORED EXAM PENN
FOSTER WITH QUESTIONS AND WELL
VERIFIED ANSWERS [GRADED A+]
REAL EXAM 100%
What is the scientific method? What is it's importance in biological
sciences? - ANS✔✔---Process used to validate observations while
minimizing observer bias
It's goal is for research to be conduced in a fair, unbiased and repeatable
manner. The best way to discover how and why the world works
What is matter? - ANS✔✔---Anything that has mass and takes up space
What is an atom? - ANS✔✔---smallest unit of matter that retains all the
chemical properties of an element. They combine to form molecules which
then form into a solid, gas or liquid
Characteristics of living things - ANS✔✔----All are composed of cells
-All obtain energy and use it to develop
-Can sense changes in the environment and adjust in response to change
-Exhibit modifications that represent adaptations to their environment
Levels of Biological Organization - ANS✔✔---atom, molecule, organelle,
cell, tissue, organ, organ system, organism
How are organisms classified? - ANS✔✔---on the basis of their
evolutionary/genetic relatedness
What is the structure of an atom? - ANS✔✔---Nucleus in the center that
contains protons (positively charged) and neutrons (no charge). The
outermost region is called an electron shell that contain the electrons
(negatively charged)
Carbohydrates - ANS✔✔---Broken down to glucose to provide energy.
What are the different kinds of carbs? - ANS✔✔---Glucose=
monosaccharide that serves as blood sugar
Sucrose= disaccharide which is table sugar
Polysaccharides= include starch, which stores energy in plants
Glycogen= stores energy in animals
Cellulose= makes up the structure of plant cell walls
Protein - ANS✔✔---macromolecule that contains carbon, hydrogen,
oxygen, and nitrogen; needed by the body for growth and repair
Lipid - ANS✔✔---Energy-rich organic compounds, such as fats, oils, and
waxes, that are made of carbon, hydrogen, and oxygen.
Serve as a long term energy source
Nucleic acid - ANS✔✔---macromolecule containing hydrogen, oxygen,
nitrogen, carbon, and phosphorus
Form DNA which acts to store genetic information
What is the cell theory? - ANS✔✔---All living organisms are made up of
cells
The cell is the smallest structural and functional unit of all living organisms
All cells arise from pre-existing cells
Ribosome - ANS✔✔---Makes proteins
Endoplasmic Reticulum - ANS✔✔---A cell structure that forms a maze of
passageways in which proteins and other materials are carried from one
part of the cell to another.
Smooth ER - ANS✔✔---Makes lipids
What is an ionic bond? - ANS✔✔---A chemical bond that's formed when
an atom transfers and elect