Question

for the following:
i) After the death of apex consumers, their energy becomes available to th
a) primary consumers b) secondary consumers c) sun d) Decomposer
ii) Which of the following is an alga?
a) Funaria b) Agaricus c) Spirogyra d) Nephrolepis
iii) By which process lactobacilli convert lactose sugar in milk into lactic acid
a) Respiration
b) Neutralization
c) Nitrogen fixation d) Fermentation
v) Which microbe cause chicken pox and measles?
a) Fungi b) virus
c) Protoza
d) Bacteria
Which of the following has trimerous symmetric flower?
a) Mustard b) Maize c) Banyan d) Lentil
olve the following
Find odd man out
[05
Lactobacilli, Rhizobia, yeast, clostridium​

Answer 1

Answer:

Given

a

2

=13 and a

5

=25

We know that

a

n

=a+(n−1)d

∴a

2

=a+(2−1)d

⇒13=a+(2−1)d

⇒a+d=13 ...(i)

and a

5

=a+(5−1)d

⇒25=a+4d

⇒a+4d=25 ...(ii)

Now, subtracting (i) from (ii), we get

3d=12

⇒d=4

Now a+d=13 [from (i)]

⇒a=9

Hence, a

7

=a+6d=9+6(4)

⇒a

7

=33