Question

QUESTION 5 What is double fertilization? Which clade of plants uses it? TT T Arial 3 (12pt) T..E S Path:p Words:0 QUESTION 6 The coniferophyta are very common in cold climates. Describe two of their adaptations for their success in places most other plants would not survive. TT T Arial 3 (12pt) T.E E 5.02

Answer 1

®) what is double pertilization? wbieb elad of plants reses it. solution. The pollen efrais germimates on the stigma and the resulting pollen tube eprows through the tissues o stigma and reaches upto style. Pollen tube enters the embryo sae through the miesopylar end and discharge the two male gamets in the pollen eprais. One of the male gamets fuses with the egg cell to form the zygote. This is Pinowm as sy ngamoy The other male gamets puses with the diploid nucleus to produce the trip loco primary endosperm mulus PPEN): This called double fertilizatio- ,, It is the unique occurs in angiosperms, Zygote sperm & egg cell L sym gamy Sperm + diploid nuchus -it. PEN Triple fusion

"") The conijenophyth are very common in -cold climates. Describe two of their adaptations for their success in placer most Other plant would not survive solution: The conifesophyta are very common i eld eliomates, because The most common features B cordifeso phyta is having needles like deaves wił waxy cutiele, mese Leaves have minimum surface area which help to redelse evaporative water losses. Conifers do not replace or drop heer Leaves to save nutrition and also energy as they are evergreens 2) Usually conifest bave bark's which are mueb Hicker to protect them from cold. Trees are tall and narrow, exrows close together protection from wind.