Question

221. Breeding of a certain species of insects is incredible
everyday the total number of such insects in a closed
glass jar is double the number on the previous day.
There was just one insect in the jar on 1/2/2007
and the jar was full to the brim with these insects
on 28/2/2007. On which date of February was the
jar quarter-full?
(P.C.S., 2008)
(a) 7
(b) 14
(d) None of these
(C) 26​

Answer 1

Answer:

Thick-walled fiber cells are also associated with phloem tissue. In dicot roots, the xylem tissue appears like a 3-pronged or 4-pronged star. The tissue between the prongs of the star is phloem. The central xylem and phloem is surrounded by an endodermis, and the entire central structure is called a stele.