The vascular cambium normally gives rise to:
1. Primary Phloem
2. Secondary xylem
3. Periderm
4. Phelloderm
Thalassemia and sickle cell anaemia are caused due to a problem in globin molecule synthesis. Select the correct statement:
| 1. | Both are due to a quantitative defect in globin chain synthesis |
| 2. | Thalassemia is due to less synthesis of globin molecules |
| 3. | Sickle cell anemia is due to a quantitative problem of globin molecules |
| 4. | Both are due to a qualitative defect in globin chain synthesis |
The genotypes of a husband and wife are IAIB and IAi respectively. Among the blood types of their children, how many different genotypes and phenotypes are possible?
1. 3 genotypes; 4 phenotypes
2. 4 genotypes; 3 phenotypes
3. 4 genotypes; 4 phenotypes
4. 3 genotypes; 3 phenotypes
Which of the following facilitates opening of stomatal aperture?
| 1. | Decrease in turgidity of guard cells |
| 2. | Radial orientation of cellulose microfibrils in the cell wall of guard cells |
| 3. | Longitudinal orientation of cellulose microfibrils in the cell wall of guard cells |
| 4. | Contraction of outer wall of guard cells |
In Bougainvillea thorns are the modifications of:
1. Adventitious root
2. Stem
3. Leaf
4. Stipules
Which one of the following is related to Ex-situ conservation of threatened animals and plants?
1. Biodiversity hot spots
2. Amazon rainforest
3. Himalayan region
4. Wildlife safari parks
Root hairs develop from the region of:
1. Elongation
2. Root cap
3. Meristematic activity
4. Maturation
A disease caused by an autosomal primary non-disjunction is:
1. Klinefelter's Syndrome
2. Turner's Syndrome
3. Sickle Cell Anemia
4. Down's Syndrome
The water potential of pure water is:
1. Less than zero
2. More than zero but less than one
3. More than one
4. Zero
Which of the following options gives the correct sequence of events during mitosis?
| 1. | Condensation, nuclear membrane disassembly, arrangement at the equator, centromere division, segregation, telophase |
| 2. | Condensation, crossing over, nuclear membrane disassembly, segregation, telophase |
| 3. | Condensation, centromere division, segregation, arrangement at the equator, telophase |
| 4. | Condensation, nuclear membrane disassembly, crossing over, segregation, telophase |
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