2019 June (SAY)PART A: BOTANY
(Maximum: 30 Scores)
Answer all the questions from 1 to 3. Each carries 1 Score.
1. Choose
the correct answer.
A parthenocarpic fruit is:
a.
Banana
b.
Apple
c.
Strawberry
d.
Guava
2. Expand
CNG.
3. Observe
the relationship between the first two terms and fill in the blank.
Funicle: Stalk of the ovule.
...................: Protective envelopes
of the ovule.
Answer any 9
questions from 4 to 14. Each carries 2 score. (9 x 2 = 18)
4. Restriction
endonuclease recognises a specific sequence in the DNA. Name that sequence and
write its peculiarity.
5. Decomposition
takes place through different steps. The first step is fragmentation. Write the
other four steps.
6. Alpha-I
antitrypsin and alpha-lactalbumin are two biological products produced from
transgenic animals. Write the uses of these two products.
7. Water
bodies around us are getting polluted due to various reasons. Write any four
consequences of water pollution.
8. Match the
items of column A with B:
|
A |
B |
|
(a) Cloning Vector (b) Separation of DNA fragments (c) PCR (d) Converts raw materials into specific
products |
(i) Bioreactor (ii) Taq polymerase (iii) Electrophoresis (iv) Hind 11 (v) pBR322 |
9. Observe the flowchart showing the stages
of a kind of succession. Identify and write the kind of succession. Fill in the
blanks a, b, c.
10. Differentiate
natality and mortality. Write the alphabets used to indicate natality and
mortality.
11. Some
organisms develop through parthenogenesis. Define this phenomenon and give an
example.
12. Name the
interaction between sea anemone and clown fish. Justify your answer with suitable
explanation.
13. Bt cotton
is an insect resistant plant that contains gene from a bacterium. Name that
bacterium and gene.
14. Observe
the figure given below:
Name the nutrient cycle and fill in the blank (a), (b).
Answer any 3
questions from 15 to 18. Each carries 3 score. (3 x 3 = 9)
15. Explant
and totipotency are two terms related to tissue culture.
a. Define
these two terms.
b. What is a
somaclone?
16. Wind
pollination is common in grasses. Write any three floral features in grasses
that help in wind pollination.
17. Observe
the figure showing the relative contribution of various greenhouse gases to
global warming.
a.
Identify
A, B.
b.
Write any
two consequences of global warming.
18. Write any
three parts of a monocot embryo and write one peculiarity of each of these three
parts.