I think the correct answer from the choices listed above is option B. A gene is a tightly coiled strands of DNA. A gene is the basic unit of heredity and is made up of DNA. It acts as instructions to make molecules. Hope this answers the question.
A transitional aquatic ecosystem is one type among the aquatic systems.
There are two types in it.
Explanation:
- Estuary is formed when freshwater from the river combines with salt water from the ocean.
- The estuary is a home for a variety of species.
- Algae and marsh grasses are dominant producers.
- Wetlands are saturated with water and support aquatic plants for their survival.
- It serves as a living place for a variety of species ranging from reptiles, birds to some mammals
Answer:
The correct answer will be option-A
Explanation:
Colchicine is the drug that prevents the assembly of the mitotic spindles which halts or stops the cell cycle.
The colchicine acts by inhibiting the microtubule polymerization thus mitotic spindles which takes place after the condensation of the chromosomes during prophase and pre-metaphase.
This acts as checkpoint which can halt the cell cycle at the phase of chromosome condensation.
Thus, option-A is the correct answer.
Those are both examples of ecological services!
