Question 1: Cuticle
Reason: Primary function of plant is cuticle is to act a barrier to prevent evaporation of water from the leave surface(epidermal surface) and also preventing water from entering the tissues.
Question 2: Answer is D
Reason: Ferns belongs to a group of plants that do not produce seeds, but reproduce by means of spores, produced in a capsule called sori
Question 3: Answer is Mosses and ferns
Reason: the earliest plant form spore producing plants which include the bryophytes(mosses) and ferns.
Both the force of windshield on the bug and that of the bug on the windshield are equal but in opposite direction.
<u>EXPLANATION: </u>
When the vehicle is moving forwards and air flows around it, and it also causes the flying bugs to hit the windshield. This impact causes a force that is imparted on both the bug and the windshield.
Thus both the bug and the windshield experience equal and opposite reactions result in Newton's Third law of motion. According to this law, it states that there will be an equal and opposite reaction for every reaction.
Nitrogen fixation is the process where atmospheric nitrogen is converted by bacteria into biologically usable forms.
plant can not take nitrogen directly from the leaves.
<span>Ni = 5
The Rydberg formula for hydrogen is
1/w = R(1/a^2 - 1/b^2)
where
w = wavelength in vacuum
R = Rydberg constant 1.0973731568508x10^7 1/m
a,b = integers greater than or equal to 1 and a < b
Now we need to select the value for a.
a = 1 will converge towards 91.13 nm
a = 2 converges towards 364.51 nm
a = 3 converges towards 820.14 nm
...
Because of this, we will assume a = 1 for this problem since it converges closest to the wavelength given.
Substitute known values
1/w = R(1/a^2 - 1/b^2)
1/9.504x10^-8 = 1.0973731568508x10^7(1/1^2 - 1/b^2)
10521885.52 = 1.0973731568508x10^7(1/1 - 1/b^2)
0.958824759 = 1 - 1/b^2
-0.041175241 = -1/b^2
0.041175241 = 1/b^2
24.28643927 = b^2
4.928127359 = b
So Ni = 5.</span>
