Saturday, July 24, 2010

http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/P/PlantTissues.gif

Q 1:..................account for secondary growth in plants.
Apical Meristems
Lateral Meristems
Intercalary Meristems



Q 2:.................are sclerenchyma cells that are randomly distributed throughout other tissues. Sometimes they are grouped within other tissues in specific zones or regions. They are generally as long as they are wide. An example, would be the gritty texture in some types of pears.

Fibers
Sclereids
chlorenchyma




Q 3:Generally, secretory cells are derived from .............cells and may function on their own or as a tissue. They sometimes have great commercial value.Examples: oils in citrus, pine resin, latex, opium, nectar, perfumes and plant hormones.
Collenchyma
Parenchyma
Sclerenchyma




Q 4:Click the wrong option.
xylem-simple tissue
epidermis-complex tissue
periderm-complex tissue




Q 5:...............function in gas exchange between the air and the stem interior.
Companion cells
Lenticels
Nodes




Q 6:The main function of meristematic tissue is ............. The cells are small, thin-walled, with no central vacuole and no specialized features.
transportation
meiosis
mitosis




Q 7:Click the wrong option.
Xylem do not contains tracheids.
In angiosperms, most of the water travels in the xylem vessels.
Xylem conducts water and dissolved minerals from the roots to all the other parts of the plant.




Q 8:Click the wrong option.
Sieve elements are so-named because their end walls are perforated.
The main components of xylem are sieve elements and companion cells.
Companion cells move sugars and amino acids into and out of the sieve elements.




Q 9:The study of tissue is known as ..............
festilogy
pyroballogy
histology




Q 10:Click the wrong option.
Collenchyma is present in monocots and in roots.
Collenchymatous tissue acts as a supporting tissue in stems of young plants.
Collenchyma provides mechanical support, elasticity, and tensile strength to the plant body. It helps in manufacturing sugar and storing it as starch. It is present in margin of leaves and resist tearing effect of the wind.

IAS OUR DREAM COMPLETED SEVEN YEARs ON AUGUST 13,2016

Blog Archive