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PENN FOSTER INTRODUCTION TO BIOLOGY
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PENN FOSTER INTRODUCTION TO BIOLOGY
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-PENN FOSTER INTRODUCTION TO BIOLOGY
- ANSWER Water molds may be parasitic to both plants and animals.
___ act as a carrier for foreign DNA. - ANSWER Vectors
___ are animals with repeating segments that exhibit bilateral symmetry - ANSWER
Annelids
___ are self-feeders that depend on sunlight to split water and for the reduction of
carbon dioxide. - ANSWER Photoautotrophs
___ cloning refers to producing cells that might be used to repair spinal tissue
injuries. - ANSWER Therapeutic
___ feedback mechanisms are predominant in maintaining homeostasis in the body.
- ANSWER Negative
___ is the idea that the first eukaryotic cells arose from beneficial associations
between primitive eukaryotes and bacteria. - ANSWER Endosymbiotic theory
___ is the movement of water across a semipermeable membrane from an area of
higher concentration to an area of lesser concentration. - ANSWER Osmosis
___ is the so-called stress hormone in plants. - ANSWER Abscisic acid
____ are the smallest units of life. - ANSWER Cells
____ breaks up fats through a process of emulsification. - ANSWER Bile
____ connective tissue found in ligaments features large numbers of collagen fibers
packed closely together. - ANSWER Dense fibrous
____ is a DNA sequence that controls transcription in a prokaryote. - ANSWER An
operon
____ is a secondary form of xylem that builds up year after year. - ANSWER Wood
____ is an example of a CAM plant. - ANSWER Pineapple
____ is crucial to the development of new drugs. - ANSWER Proteomics
____ is the process of transferring normal or modified genes into an individual in an
attempt to correct some type of genetic defect. - ANSWER Gene therapy
, ____ occurs in cells especially set aside for reproduction, but not in somatic cells. -
ANSWER Meiosis
____ proteins are made of polypeptide chains folded into rounded compact shapes. -
ANSWER Globular
____ T cells regulate immunity by secreting signaling chemicals called cytokines. -
ANSWER Helper
_____ epithelial tissue secretes mucus. - ANSWER Pseudostratified
____, which help plants "fix" needed nitrogen, are located in root nodules. -
ANSWER Bacteria
94% of___ in the United States are genetically engineered. - ANSWER Soybeans
A ___ is a repeating DNA sequence found on the ends of chromosomes that acts as
a "cap" that encourages chromosomal stability. - ANSWER Telomere
A ____ can be used to test DNA samples for known disease-causing mutated
alleles. - ANSWER DNA microarray
A ____ is a rod-shaped prokaryotic cell. - ANSWER Bacillus
A coral reef with its carious species is a good example of a: - ANSWER Community
A deficiency of vitamin D can lead to bone decalcification and a disorder called: -
ANSWER Rickets
A detrital food web begins with: - ANSWER Bacteria and fungi
A group of individuals of the same species occupying a given area is a: - ANSWER
Population
A karyotype of a fetus finds that there are three number 21 chromosomes. This child
will be afflicted with: - ANSWER Down syndrome
A modification that makes organisms more suited to their environment is called: -
ANSWER Adaptation
A molecule of glucose contains: - ANSWER 6 carbon atoms, 12 hydrogen atoms,
and 6 oxygen atoms
A plant that absorbs blue-violet-green wavelengths of light, will reflect what color? -
ANSWER yellow-orange
A sand dollar or brittle star displays ____ symmetry. - ANSWER Radial
A tumor that has invaded surrounding tissues is considered to be: - ANSWER
Malignant
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