1. during mitosis, the genetic material in a cell is replicated, and then the cell splits into two new cells. the two new cells are genetically identical to the original cell.
which part of cell theory do these statements best support?
a.
all organisms are made up of many different types of cells.
b.
both living and nonliving substances are made of cells.
c.
all cells come from pre-existing cells.
d.
new cells can be spontaneously generated.
question 2 .
a is a segment of dna that contains the information necessary to express the inherited traits of an organism.
a.
gene
b.
phenotype
c.
protein
d.
sex cell
question 3 .
eva learns in class that the amount of light given off by an object obeys the inverse square law: that the intensity of light is proportional the inverse of the square of the distance.
where s is a constant and d is the distance.
eva measures the intensity of light versus distance in class and makes a graph of her results. which of the following graphs would best support the inverse square law?
w.
x.
y.
z.
a.
y
b.
w
c.
z
d.
x
question 4 .
green plants get their food through
a.
digestion.
b.
photosynthesis.
c.
respiration.
d.
osmosis.
question 5 .
if snakes were removed from the food web, what would probably happen to the grasshopper population?
a.
the population of frogs and mice would decrease which would cause the population of grasshoppers to increase.
b.
the population of frogs and mice would decrease which would cause the population of grasshoppers to decrease.
c.
the population of frogs and mice would increase which would cause the population of grasshoppers to increase.
d.
the population of frogs and mice would increase which would cause the population of grasshoppers to decrease.
question 6 .
mary has two blocks. she wants to compare the mass and volume of both, so she places them in identical buckets filled with the same volume of water. each block sinks slowly, and the picture below shows them as they are about to sink. she measures the change in water level with rulers.
mary's friend observes the investigation and claims that block b has more mass. if there were no errors in the investigation, which of the following must be true for this claim to be correct?
a.
block b must be longer than block a.
b.
block b must have more volume than block a.
c.
block b must be larger than block a.
d.
block b must have greater density than block a.
question 7 .
mandy is testing an unknown solution to determine whether it is an acid or a base. she places a piece of red litmus paper into the solution and the paper turns blue.
mandy's unknown solution
a.
does not have a ph.
b.
is a base.
c.
is an acid.
d.
is a neutral substance.
question 8 .
glucose molecules from food sources provide energy to the cells of the human body. after a person eats, the level of glucose in their blood increases.
if a person's blood glucose level becomes too high, a hormone in the pancreas, known as insulin, is released. insulin move glucose out of the bloodstream. this causes the blood glucose level to decrease and return to equilibrium.
the production of insulin is a mechanism that regulates the human body's internal environment and aids in
a.
the storage of genetic information within cells.
b.
the production of sugar molecules through photosynthesis.
c.
the production of carbon dioxide through cellular respiration.
d.
the maintenance of homeostasis within the body system.
question 9 .
chemical compounds
a.
can be made up of a combination of different elements.
b.
are always made up of one type of element and one type of atom.
c.
are always made up of several atoms with the same number of protons.
d.
can be made up of one atom with several different elements in it.
question 10 .
the first five planets from the sun
planet mean
distance
from sun
(millions
of km) orbital
period of
revolution
(earth time) period of
rotation
(earth time) equatorial
diameter
(km) density
(g/cm3)
mercury 57.9 88 days 59 days 4,880 5.4
venus 108.2 224.7 days 243 days 12,104 5.2
earth 149.6 365.3 days 23 hours
56 minutes 12,756 5.5
mars 227.9 687 days 24 hours
37 minutes 6,787 3.9
jupiter 778.3 11.86 years 9 hours
50 minutes 142,800 1.3
which of these planets has the shortest day?
a.
venus
b.
jupiter
c.
mars
d.
mercury