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Asked by benjamin001y
1 Which is the most accurate statement?Â
The principal role of a flower in the lifeÂ
cycle of a plant is:Â
  (a) attracting insectsÂ
  (b) producing seedsÂ
  (c) producing pollenÂ
  (d) producing nectar
2 Name the parts A-J shown on this drawingÂ
of a half-flower of a Stitchwort.Â
3 What is (a) the male gamete, and (b) the
female gamete in a flowering plant?Â
4 Complete the following paragraph selecting words from the list below. Pollination is the transfer of ……. from the …….. to the ……. in a flower. In cross-pollination, the ……. from a flower on one …….is transferred to the …….of another ……. of the same species.Â
   anthers, ovule, stigma, plant, flower, pollen, ovary, petal, style, receptacle, stamensÂ
5 Complete the following sentences:
  In a flowering plant fertilisation occurs when the ……..of the ……. fuses with the …….ofÂ
the ……… . After fertilisation , the ……. becomes the ……. and the ……. becomes the ……. .
6 Which of the following statements is correct? In flowering plants:Â
  (a) pollination can take place without fertilisationÂ
  (b) fertilisation can take place without pollinationÂ
  (c) pollination and fertilisation are the sameÂ
  (d) pollination and fertilisation must occur at the same time
7 Some species of plant are strongly adapted to pollination by certain insects. Which of the following characteristics would you regard as adaptations to pollination by bees:Â
  (a) white or coloured petals                   (f) small green petalsÂ
  (b) light, smooth pollen grains                (g) production of nectarÂ
  (c) spiky or sticky pollen grains               (h) production of pollenÂ
  (d) anthers and stigma inside the flower         (i) production of scent?Â
  (e) anthers and stigma protruding from the flowerÂ
8 A bee visits several flowers in succession on Â
a single willow herb plant. In doing so, theÂ
bee transfers pollen from the younger flowers,Â
near the top of the inflorescence (group ofÂ
flowers) to the older flowers nearÂ
the base of the inflorescence. Is this anÂ
example of self-pollination or cross-pollination?Â
9 Complete the drawing to show what has toÂ
happen before fertilisation can occur
Reproduction in flowering plants (continued)
10 The drawings show seeds or fruits of different plants. Â
  (a) From the appearance of the structures, make a guess at how each one is dispersed giving  Â
     reasons for your answers.Â
  (b) What are the advantages to a plant of an effective method of seed dispersal? Â
11 The root of the pea seedling is marked with equally spaced linesÂ
as shown here. Draw what you would expect to see in two days’ time if theÂ
rootÂ
  (a) grew only from the tip         (c) grew only at the top    Â
  (b) grew uniformly along its length  (d) did not grow. Â
 Â
12 (a) What conditions do most seeds need in order to begin germination? Â
   (b) What other condition do the seedlings need to continue growth to mature
      plants?Â
13 How would you design, in principle, an experiment to test the hypothesis that a certainÂ
variety of lettuce seed needed daylight in order to germinate? Â
14 Figure 1 represents a pea seed split open toÂ
show its structure. Name the parts A-CÂ
and state the function of each.Â
Figure 2 represents a pea seedling-5 days Â
after germination. Name the parts D-H.Â
15 The early stages of germination take placeÂ
in the soil where there is little or no light forÂ
photosynthesis. How does the seedling obtain
materials for its growth and energy duringÂ
needs during this time? Â
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