Sexual Reproduction in Flowering Plants — BIOLOGY STD 12 Science — Question

Write a note on cultural and religious importance of biodiversity Which type of conservation measures, in situ or ex-situ will help the larger number species to survive? Explain.

Explain the laws that Mendel derived from his monohybrid crosses.

Parthenocarpy and apomixis have been observed in some plants. Give an example of each. State a similarity and a difference observed between the two processes.

Within what age group sexually transmitted diseases (STDs) are reported to be very high. Mention three practices to avoid them.

Differentiate between two different types of pyramids of biomass with the help of one example of each.

In the garden pea plant, the green color of pod is dominant over the yellow color of the pod to determine the genotype of a plant of unknown genotype, use punnett square to represent the genotype and phenotype of the test cross?

Differentiate between:
Keystone species and endangered species.

What are called pathogens? Give information about it? (with example).

On a visit to a Hill station, one of your friends suddenly became unwell and felt uneasy.

1. List two symptoms, you would look for, to term it to be due to allergy.
2. Explain the response of the body to an allergen.
3. Name two drugs that can be recommended for immediate relief.

1. Construct a complete transcription unit with promoter and terminator on the basis of the hypothetical coding strand given below.

2. Write the RNA strand transcribed from the above transcription unit along with its polarity.