LAB
Questions for Why Are Cells So Small?
Part 1: Observation and calculations on two three-dimensional objects
.
1. Examining the two cubes in your kit:
Table 1
Dice Dimensions Surface Area
(cubes) (Length, width, # of sides x
and height) length x width
Example: length = 3 mm 6 sides x 3 x 3 =
Cube = 3 mm width = 3 mm 54 mm?
height = 3 mm
Volume
Length x width
x height
Ratio
(surface area/
volume)
Im
=
54/27 (Divide
the surface area
by the volume.
The ratio is that
number over 1.)
2/1 ratio
Small dice
5 mm
-
Large dice
16 mm
2. Consider the information in the chart above. (Remember: a higher ratio is better for
diffusion.) As the volume increased:
a. What happened to the ratio?
b. If these cubes were cells, which ratio would make diffusion easier?
c. Which size cube would make a more efficient cell?

there really is life in the deepest part

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.

estuaries are the partially enclosed coastal bodies of brackish water formed at the mouth of sea where river meets an ocean. it is a transition zone between river and sea water so estuaries are influenced to both marine environment such as tides, waves and to riverine such as flow of fresh water and sediments. the mixing of sea and fresh water provide high level of nutrients, making estuaries a high product habitats.

many estuaries suffers degradation from a variety of human activities like erosion from deforestation, overgrazing, overfishing, drainage and eutrophication.

so from the above statement answers will be

1. false as estuaries are formed due to both brackish and freshwater.

2.true, due to high productivity estuaries are breeding ground for many marine species.

3. direct and indirect activities of man that contribute to pollution and deposition of sediments.