If life consists of so many cells, why don’t we see them? a
Cells are camouflaged and are capable of disguising their selves for protection.
b
We can see them we just don't realize it.
c
They are completely transparent. They are so clear our eyes are not able to see them.
d
The human eye cannot see objects smaller than the width of a strand of hair, which is about 100 micrometers thick. The average animal cell is only about 10 micrometers.

Although cells come in many different shapes and sizes, most of the time, a cell’s shape is determined by the .

a
the amount of food it receives
b
what type of organism it is a part of
c
function it performs.
d
what type of energy it consumes

There are some basic characteristics that all cells have in common. Every cell has a .

a
cell membrane, nucleus, and DNA
b
cell membrane, cytoplasm, and DNA
c
jelly plasm, blueprint, and nucleus
d
cell membrane, stems, and DNA

Follow these directions and answer the questions. 1. set up the ripple tank as in previous investigations. 2. bend the rubber tube to form a "concave mirror" and place in the ripple tank. the water level must be below the top of the hose. 3. generate a few straight pulses with the dowel and observe the reflected waves. do the waves focus (come together) upon reflection? can you locate the place where the waves meet? 4. touch the water surface where the waves converged. what happens to the reflected wave? 5. move your finger twice that distance from the hose (2f = c of c, center of the curvature) and touch the water again. does the image (the reflected wave) appear in the same location (c of c)? you may have to experiment before you find the exact location. sometimes it is hard to visualize with the ripple tank because the waves move so quickly. likewise, it is impossible to "see" light waves because they have such small wavelengths and move at the speed of light. however, both are examples of transverse waves and behave in the same way when a parallel wave fronts hit a curved surface.

1.)the isotope cobalt-60 has a nuclear mass of 59.933820 u calculate the mass defect of cobalt-60 using the following information. mass of proton: 1.007825 u mass of neutron: 1.008665 u 1 u = 931.5 mev 2.)the isotope cobalt-60 has a nuclear mass of 59.933820 u calculate the binding energy of cobalt-60 using the following information. mass of proton: 1.007825 u mass of neutron: 1.008665 u 1 u = 931.5 mev 3.)the isotope cobalt-60 has a nuclear mass of 59.933820 u calculate the binding energy per nucleon of cobalt-60 using the following information. mass of proton: 1.007825 u mass of neutron: 1.008665 u 1 u = 931.5 mev

The amount of potential energy possessed by an elevated object is equal to what?