6) Which of the following does not fall in the biotic component of the ecosystem? a) water
b) animals c) plants
d) grass
7) The water and the mineral ions from the soil till the tip of the plant is made availab
tube like structure called
a. Guard cell. (6) Stomata c. Xylem d. Small hole.
8) The student peeled off a green leaf and observed it under a microscope. What sha
is expected to be seen by the students?
a) Oval
b) cylindrical
c) conical
d) rectangul
9) Lack of calcium in the diet causes
a) Anemia b) simple goiter c) poor growth of bones and teeth
d) to
1

Listen base your answer to the question on the information below.propane is a fuel that is sold in rigid, pressurized cylinders. most of the propane in a cylinder is liquid, with gas in the space above the liquid level. when propane is released from the cylinder, the propane leaves the cylinder as a gas. propane gas is used as a fuel by mixing it with oxygen in the air and igniting the mixture, as represented by the balanced equation below.c3h8(g) + 5o2(g) → 3co2(g) + 4h2o() + 2219.2 kja small amount of methanethiol, which has a distinct odor, is added to the propane to consumers detect a propane leak. in methanethiol, the odor is caused by the thiol functional group (–sh). methanethiol, ch3sh, has a structure that is very similar to the structure of methanol.what is the correct structural formula for a molecule of methanethiol