Question
Sketch and label, Meselson and Stahls experiment.
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Complete the table-Related to outbreeding devices.
| Type | Description | Example |
| 1. ———— | Unisexual flowers/Monoecious or dioecious plants | Papaya, Maize |
| 2. ———— | Mechanical device to prevent Self-Pollination – Natural physical barrier | —————- |
| 3. Prepotency | ——————– | Apple |
| 4.Heteromorphy | ——————– | Primula |
| 5. Protandry | Androecium matures earlier than gynoecium | —————- |
Complete the given table
→| Name of polluting gas | Source | Effect |
| —————— | ————– | Combining with haemoglobin and causing respiratory problems |
| $NO_2$ | Chemical industries | —————– |
| $CO_2$ | ————— | —————— |
| ——————- | Biogas plants | Greenhouse effect |
| Era | Dominating group of animals |
| 1. Coenozoic | ………………………………. |
| 2. ………………………………. | Reptiles |
| 3. Palaeozoic | ………………………………. |
| 4. ………………………………. | Lower Invertebrates |
Complete the following table by placing the categories and the given signs + : Benefited ; – : Inhibited ; 0 : Not affected
| Interactions | Species | |
| A | B | |
| 1. Neutralism – ………………….. | ||
| 2. Negative interactions ………………………… | ||
| 3. Positive interactions ……………………. | ||
| 4. Both positive and negative interactions ………………………….. | ||
| Waves on ECG | Heart Activity | Caused due to |
| P wave | Atrial contraction | —————- |
| QRS wave | —————– | Ventricular depolarization |
| T wave | —————– | Ventricular repolarization |
Classify the given plant growth regulators as per their specific control of event in plant life cycle in Column A and complete Column B.
(IAA, GA, Cytokinin, Abscissic acid)
(IAA, GA, Cytokinin, Abscissic acid)
| Column A | Column B |
| (1) Shedding of leaves | ———— |
| (2) Induce flowering in LDP | ———— |
| (3) Apical dominance | ———— |
| (4) Induce RNA synthesis | ———— |
(1) Identify A, B and C.
(2) What are their sizes?
(2) What are their sizes?
Sketch the concept maps for mechanism of vision and mechanism of hearing.
Complete the table.
→| Number | Type | No. of Pairs | Region |
| ———— | Cervical | ————- | ————— |
| $T_1– T_{12}$ | ————- | $12$ pairs | ————- |
| $L_1 – L_5$ | ————- | $5$ pairs | Lower back |
| ————- | Sacral | ————- | Pelvic |
| ————– | Coccygeal | ————— | Tall region |
Types of traits:
[Flower colour of Mirabelis jalapa, Coat colour of cattle, Human blood groups]
[Flower colour of Mirabelis jalapa, Coat colour of cattle, Human blood groups]
| Column A | Column B |
| (1) Co-dominance | —————– |
| (2) Incomplete dominance | —————– |
| (3) Multiple allelism | —————– |