Why is the emergence of the radicle an important first step in germination? a. Its hook helps protect the shoot that emerges later. b. It carries out photosynthesis to supply the embryo with food. c. It is important for establishing a supply of water to the growing embryo.= d. It is necessary to break the seed coat.

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1. The emergence of the radicle, which is the embryonic root, is an important first step in germination because it anchors the seed in the soil and starts absorbing water even before the shoot emerges. This is crucial for the survival and growth of the plant embryo. Therefore, the correct answer is c. It is important for establishing a supply of water to the growing embryo.
2. The radicle does not carry out photosynthesis (option b), this is the role of the leaves once they have emerged and are exposed to light.
3. The radicle does not have a hook to protect the shoot (option a), this is a characteristic of the hypocotyl/arched cotyledon in some plants.
4. The radicle does not break the seed coat (option d), the seed coat is usually broken by the expansion of the embryo as it absorbs water.

Key Concepts

Radicle Function

The radicle is the embryonic root of a seed that emerges first during germination. Its primary function is to anchor the plant and establish a root system, which is crucial for water and nutrient absorption. This initial growth is vital for the plant's survival and development as it transitions from a dormant seed to an active growing organism.

Germination Process

Germination is the process by which a seed develops into a new plant. It involves several stages, starting with the absorption of water, which activates metabolic processes. The emergence of the radicle marks the beginning of this process, as it allows the plant to secure itself in the soil and access essential resources for growth.

Seed Coat Function

The seed coat serves as a protective barrier for the seed, safeguarding the embryo from physical damage and desiccation. During germination, the radicle's emergence is crucial for breaking through the seed coat, allowing the plant to grow. This process ensures that the embryo can access the soil environment necessary for further development.