LULLY 2.1. The dlagram below shows the apparatus used to investigate the rate of photosynthesis in a
submerged plant. The light intensity to which the plant is subjected, was decreased at regular
intervals by moving the light source away from the plant. The average number of bubbles released
per minute, was counted and recorded for each distance
study the information provided and answer the questions that follow.
Position of lamp in cm
The results obtained is shown in the following table.
Distance from lamp (cm)
5
10
20
25
35
40
50
Number of bubbles per minute
70
65
40
25
15
5
2
2.1.1. Formulate a hypothesis for the above investgation
(2
212 State the following:
Dependent variable
independent variable
Fixed variable
2.1.3. State ONE way in which the reliability of the investigation could be improved.
2.1.4. Draw a line graph to represent the data in the table.​

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!

the correct answer is - d. china has a large and growing population.

the fact that china has a large (the biggest) population, and it is still growing, doesn't hinder the agriculture production in the country. in fact, it can for increased production in the agriculture, since there's more labor force, as well the sheer mass of people produces lots of scientists that come up with new inventions as to how to improve this sector. nice example is the inner mongolia region in china, in general dominated by the gobi desert, but few scientist came up with a nice idea as to how to make the region productive by using plants that are very resistant to droughts, so lots of people have been employed, and the region is becoming greener and greener each year, and the production of food in this region is also increasing.

maybe because its impossible for balloons to lift a whole entire house.