Which of the labelled structures is the nucleus?
I
II
III
IV
V
Correct answer is B
No explanation has been provided for this answer.
I and II
II and IV
III and VII
IV and VII
IV and VIII
Correct answer is D
No explanation has been provided for this answer.
Which of the following conclusions cannot be drawn from the graphs?
Ion is taken up more rapidly at suitable temperature
Suitable oxygen concentration increases ion uptake
Ion uptake requires energy from aerobic respiration of sugar
Ion uptake occurs most rapidly in adequate supply of, respiratory substrate
The quantity of ions absorbed is inversely proportional to the quantity of carbohydrate (sugar) synthesized
Correct answer is E
No explanation has been provided for this answer.
Evaluate \( 202^2_{three} - 112^2_{three}\)
21120
21121
21112
21011
Correct answer is A
\(202^2_{three}\)when converted to base ten \(=(202_3)^2\\
202_3 = 2 \times 3^2 + 0 \times 3^1 + 2\times 3^0 = 18 + 0 + 2\\
=20_{ten}; (202_3)^2 = (20)^2_{ten} = 400\\
112^2_{three}\)when converted to base ten \(= (112_3)^2\\
112_3 = 1 \times 3^2 + 1 \times 3^1 + 2\times 3^0 = 9+3+2=14_{ten}\\
(112_3)^2 = (14)^2_{ten} = 196_{ten}\\
Evaluate \Longrightarrow 400-196 = 204\)
Reconvert to base three
\(\begin{matrix}
3 & 204\\
3 & 69 &R0\\
3 & 22 & R2\\
3 & 7 & R1\\
2 & 2 & R1\\
& 0& R2 \uparrow\\
\end{matrix} \\
=21120_3\)
The bearing of P from Q is x, where 270o < x < 360o. Find the bearing of Q from P
(x - 90)o
(x-270)o
(x - 135)o
(x - 180)o
Correct answer is D
Bearing of Q and P
\(180^{\circ} – (360^{\circ}-x)\\
180^{\circ}-360^{\circ}+x\\
-180^{\circ}+x\\
x-180^{\circ}\)
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