Question
The diagram below represents a mature embryo sac. Study it carefully and answer the questions that follow.
IMG_42
(a) Identify the structures labeled x and y.
X-
Y-
(b) State what is formed when x and y are fertilized.
x-
y-
(c) Why is cross- pollination more advantageous than self-pollination?
IMG_42
(a) Identify the structures labeled x and y.
X-
Y-
(b) State what is formed when x and y are fertilized.
x-
y-
(c) Why is cross- pollination more advantageous than self-pollination?
Answer
(a) X- polar nuclei;
Y- Egg cell ;
(b) X- triploid endosperm /primary endosperm;
Y- The embryo;
(c) It leads to mixing of genes /causes variations to develop; which lack in self-pollination.
Y- Egg cell ;
(b) X- triploid endosperm /primary endosperm;
Y- The embryo;
(c) It leads to mixing of genes /causes variations to develop; which lack in self-pollination.
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