Question 2 :
Choose the correct answers from the alternatives given.<br>A major difference between algae and most fungi is that the former possess:

Question 3 :
If the diploid number of a flowering plant is 36. What would be the chromosomes number in its endosperm?

Question 7 :
Each make gamete of a coconut plant has $16$ chromosomes. The number of chromosomes in a cell of the white pulp of coconut is?

Question 9 :
Narrow thin-walled cells with a large nucleus and lying on the side of sieve tube are absent in

Question 10 :
The young bryophyte gametophyte that develops following spore germination is known as

Question 19 :
Chilgozas, the common dry fruit eaten in many Indian families, are the seeds of a

Question 21 :
Micropyle, chalaza and funiculus lie in one vertical plane in ovule

Question 30 :
Study the given statements about gymnosperms and select the correct option. <br/>(i) Mode of fertilisation is siphonogamy.<br/>(ii) Male and female cones are borne on same tree in<i> Pinus</i><br/>(iii) Endosperm represents female gametophyte.

Question 33 :
Plants of this group are diploid and well adapted to extreme conditions.They grow bearing sporophylls in compact structures called cones. The group-in reference is

Question 34 :
Given below are assertion and reason. Point out if both are true with reason being correct explanation (A), both are true but reason is not correct explanation (B), assertion true but reason is wrong (C) and both are wrong (D).<br><b>Assertion.</b> In angiosperms, transport of food and water is more efficient than gymnosperms and pteridophytes<br><b>Reason.</b> In angiosperms, longitudinally arranged sieve elements and vessels with perforated end walls are present

Question 35 :
<i>Selaginella</i> and <i>Salvinia</i> are considered to represent a significant step toward the evolution of seed habit because

Question 38 :
Which of the following is a form class of red algae?

Question 41 :
Which of the following is correct in case of homosporous pteridophytes?

Question 44 :
Choose the correct statements:<br>A. Companion cells and sieve tubes are absent in pteridophytes.<br>B. Gametophyte of pteridophytes require cool, dry and shady places to grow.<br>C. Prothallus is found in Dryopteris.

Question 45 :
Which one of these does not require external water for fertilisation?

Question 47 :
When the spore of a fern plant falls on moist ground, it germinates to form a green filament. It soon grows into a flat, green, heart-shaped Structure, known as

Question 50 :
Unicellular algae X and Y of the same species were taken, experimentally chloroplasts were removed from cell X. After some time, they both were kept in bright sunlight for a few hours and then the iodine test was performed on them. What will be the result?