Home
Class 12
BIOLOGY
which of these characters does/do not ap...

which of these characters does/do not apply to vascular bundle of moncot stem.
I. conjoint II. Endarch protoxylem III. Open IV. Phloem parenchyma is absent.

A

I and II only

B

II and III

C

I and IV only

D

III

Text Solution

Verified by Experts

The correct Answer is:
d
Promotional Banner

Similar Questions

Explore conceptually related problems

The transverse section of a plant material shows the following anatomical features, (a) the vascular bundles are conjoint, scattered and surrounded by clerenchymatous undle sheaths (b) phloem parenchyma is absent. What will you identify it as?

Identify the correct pair of characters in physalis I. Petiole adnate to stem. II. Thalamus cup-shaped. III. Seeds non-endospermic. IV. Flowers hypogynous.

Go through the following statements (i) Phloem parenchya is absent in most of the monocot (ii) Phloem fibres store food material and other substance like resins, latex and mucilage (iii) Phloem fibre are generally absent in the primary phloem but are found in the secndary phloem (iv) Gymnosperms lack sieve tubes and albuminous cells. Which of these are correct ? a. (i), (ii) and (iii) b. (ii), (iii) and (iv) c. (i) and (iii) d. (i), (iii) and (iv)

Go through the following statements (i) The cambium is generally more active on the inner side than on the outer. (ii) The autumn wood is darker and has a higher density than spring wood. (iii) In stem, the secondary xylem shows distinction into protoxylem and metaxylem and occurs in the from of patches. (iv) The tracheids and vessels of the sapwood get plugged by the ingrowth of the adjacent parenchyma cells into their cavities called tyloses. Which of theses are correct ? a. (i), (ii) & (iii) b. (i), (ii) & (iv) c. (i) and (ii) d. (i), (iii) & (iv)

Select the characters which are not applicable to the family solanaceae (i) Epipetalous and syngenesious anthers (ii) Bicarpellary and syncarpous ovary (iii) Oblique ovary with axile placentation (iv) Stamens six, arranged in two whorls (V) Bicarpellary, syncarpous and inferior ovary

Which of the following photosynthetic characteristics are present in C_(3) plants but not in C_(4) plants- I. CO_(2) compensation point of 0-10 ppm- II. Relatively higher rate of photorespiratory CO_(2) evolution- III. Presence of well developed bundle sheath- IV. Initial involvement of RUBP carboxylase in CO_(2) assimilation - Select the correct answer using the codes given below

Go through the following statement (i) Relaxin produced by the ovary, facilitates delivery of the foetus by softening the connective tissue of pubic symphysis and relaxing the pelvic ligaments and joints. (ii) By the end of fifth month of pregnancy, the foetus develops limbs and digits. (iii) Thalidomide is a teratogenic drug which causes a condition called phocomelia. (iv). Although the levels of prolactin are high during pregnancy, milk secretion does not occur because of the high oestrogen and progesterone levels which make the breast unresponsive to the prolactin. Which of these are correct?

Identify the correct pair of characters with reference to Pteris. I, Neck canal cell is uninucleated II Stem grows vertically in soil III. Apogamously produced sporophytes are haploids IV. Open dichotomous venation in leaflets

Which of the following does not belong to class basidimycetes (i) Agaricus (ii)Trichoderma (iii) Puccinia (iv) Saccharomyces (v) Ustilago

Which of the following statements are correct about heartwood? (i). It does not help in water conduction (ii). It is also called alburnum (iii). It is light in colour and is very soft (iv). It has tracheray elements which are filled with tannins, resins etc.