Biology Today — May 2017

12. Match Column I with Column II. (There can be more than
    one match for items in Column I).
    Column I Column II
    A. Exarch xylem (i) Proxylem towards outer
    side
    B. Endarch xylem (ii) Centripetal development
    C. Prickles (iii) Epidermal outgrowth with
    some inner tissues
    D. Trichomes (iv) Strictly epidermal outgrowth
    (v) Centrifugal development
    (vi) Proxylem towards centre
    (vii) Absence of vascular supply
    (viii) Digestive glands of
    insectivorous plants

Passage Based Question

13. Complete the given passage with appropriate words or
    phrases.
    Dicot stems produce (i) in outer cortical cells. It divides on
    the outer side to form (ii) , while on the inner side produces
    (iii). The phellem or cork cells are (iv) and have deposition of
    (v). Phellem, phellogen and phelloderm collectively form (vi).
    The function of periderm is protective. Bark includes periderm,
    (vii), (viii), primary and secondary (ix).

Assertion & Reason

In each of the following questions, a statement of Assertion (A)
is given and a corresponding statement of Reason (R) is given
just below it. Of the statements, mark the correct answer as :

(a) if both A and R are true and R is the correct explanation of A
(b) if both A and R are true but R is not the correct explanation of A
(c) if A is true but R is false
(d) if both A and R are false.

14. Assertion : Epidermal cells of cereals have a deposition
    of silica.

Reason : Silica is abrasive and provides stiffness.

15. Assertion : Root apical meristem appears cup-shaped.

Reason : Quiescent centre is present in the centre of
the root apex.

16. Assertion : Epiblema is also called piliferous layer.

Reason : Epiblema bears root hair.

17. Assertion : Leaves of maize gets rolled up to reduce
    the loss of water in water deficient condition.

Reason : Maize have palisade parenchyma in their
mesophyll.

18. Assertion : Lenticels are found in woody trees as well
    as in climbers.

Reason : Lenticels are produced by phelloderm.

Figure Based Questions

19. Refer to the given diagram and answer the following

questions. (^) P
Q
R
S
T
(a) Identify P, Q, R, S and T.
(b) Identify the type of
vascular bundle in the
given figure.
(c) Describe the
characteristics of xylem
present in this type of
vascular bundle.

20. Consider the given figure and answer the following
    questions.

X

(a) Identify the structure X.

(b) Where is X found?

(c) Explain how X is formed.

CHAPTER-7 : STRUCTURAL ORGANISATION

IN ANIMALS

Multiple Choice Questions

1. Tendon is made up of
   (a) white fibrous tissue
   (b) yellow elastic tissue
   (c) loose connective tissue
   (d) both (a) and (c).


2. Select the mismatched pair.
   (a) Merocrine gland - Salivary glands
   (b) Apocrine gland - Mammary glands
   (c) Holocrine gland - Gonads
   (d) Heterocrine gland - Pancreas


3. Which of the following statements are incorrect regarding
   connective tissues?
   I. White fibres are made up of collagen fibres and
   fibroblasts.
   II. Yellow fibres form ligament that connect skeletal
   muscle to a bone.
   III. Tendons are formed by yellow elastic connective
   tissues.
   IV. Yellow fibres make cartilage more flexible.
   (a) I and II (b) I and III
   (c) III and IV (d) II and III