Class 12 Biology 2024 Board Exam

Homologous organs indicate :
[Max Marks: 1 | Set: 57/2/2]

In which of the following plants are both male and female flowers born on
the same plant and the mode of pollination can be geitonogamy or
xenogamy ?
[Max Marks: 1 | Sets: 57/1/1, 57/1/2]

Refer to the Venn diagram given below. Select the option with correct
examples P, Q, and R :
[Max Marks: 1 | Set: 57/1/3]

An angiosperm embryo sac is located within the :
[Max Marks: 1 | Set: 57/2/1]

Match the items in Column I with those in Column II and select the
correctly matched option from those given below :
Column I Column II
Cross Phenotypic Ratio

1. Mendelian monohybrid (i) 1 : 2 : 1 (F2)
2. Mendelian dihybrid (ii) 1 : 1
3. Incomplete dominance (iii) 3 : 1 (F2)
4. Test cross (monohybrid) (iv) 9 : 3 : 3 : 1 (F2)
   Options :
   [Max Marks: 1 | Sets: 57/2/1, 57/2/2, 57/2/3]

Which one of the following is not used as a vector for rDNA technology ?
[Max Marks: 1 | Set: 57/2/3]

Which one of the following hormones is secreted by the human placenta
that helps in the maintenance of pregnancy ?
[Max Marks: 1 | Sets: 57/1/1, 57/1/3]

Select the option that has the correct sequence of events of human female
reproductive cycle :
(i) Secretion of FSH
(ii) Ovulation
(iii) Growth of corpus luteum
(iv) Growth of follicle and oogenesis
(v) Sudden increase in LH
Options :
[Max Marks: 1 | Set: 57/1/2]

In humans, the secondary oocyte completes meiotic division when :
[Max Marks: 1 | Sets: 57/2/1, 57/2/2, 57/2/3]

The periodic abstinence by a couple for family planning should be from :
[Max Marks: 1 | Sets: 57/1/1, 57/1/2, 57/1/3]