Reproductive Parts of a Flower Quiz

Gemmule is an internal bud formed in sponges, containing a mass of dormant cells called archaeocytes. These archaeocytes are coated by a thick resistant layer of secretion by amoebocytes, allowing them to develop into a new organism when conditions are favorable.

Gemmule formation in sponges occurs as a survival strategy to overcome unfavorable conditions. It allows for the preservation of dormant cells that can develop into a new organism when conditions become favorable.

Apomixis is a type of asexual reproduction where seeds are produced without fertilization. An example of apomixis is the formation of seeds from the maternal plant's ovule without the need for pollination.

<p>Seed dormancy is a period in which a seed is alive but not growing. It is a protective mechanism that prevents germination until conditions are optimal for the seed to grow into a new plant.</p> Signup and view all the answers

<p>Seed germination is the process where a seed develops into a new plant. It typically involves the seed absorbing water, followed by the growth of a radicle, which develops into the primary root, and the emergence of the shoot through the soil.</p> Signup and view all the answers

<p>Seed viability can be influenced by factors such as the age of the seed, storage conditions, exposure to light, temperature, and humidity levels. These factors can impact the seed's ability to germinate and develop into a healthy plant.</p> Signup and view all the answers

<p>Endospermic or albuminous and non-endospermic or exalbuminous seeds.</p> Signup and view all the answers

<p>Endospermic seeds retain endosperm in mature seeds, while non-endospermic seeds absorb all food reserves from endosperm during development.</p> Signup and view all the answers

<p>The micropyle allows the entry of water and oxygen during soaking.</p> Signup and view all the answers

<p>In some seeds, cotyledons act as food storage, while in others, they are the first photosynthetic organs.</p> Signup and view all the answers

<p>Pollination is essential for seed production and fruit formation.</p> Signup and view all the answers

<p>Seed development is initiated by fertilization.</p> Signup and view all the answers

<p>The main categories of apomixis are recurrent apomixis and non-recurrent apomixis. Recurrent apomixis involves the embryo sac rising from an archesporial cell or nucellus, while non-recurrent apomixis involves a haploid embryo sac formed from a megaspore mother cell.</p> Signup and view all the answers

<p>Dormancy in seeds is a state of metabolic arrest that facilitates survival during adverse environmental conditions. It is important for the dispersal of seeds and ensures that viable seeds germinate only after a period of dormancy.</p> Signup and view all the answers

<p>Germination is the process where a seed sprouts and begins to grow into a new plant. It involves the seed absorbing water, activating enzymes, and initiating growth of roots and shoots.</p> Signup and view all the answers

<p>Apomixis is a form of asexual reproduction in plants where seeds are produced without fertilization. It helps in the preservation of desirable traits and genetic uniformity.</p> Signup and view all the answers

<p>Seed viability refers to the ability of a seed to germinate and grow into a healthy plant. Dormancy ensures that viable seeds do not germinate prematurely and have a better chance of survival.</p> Signup and view all the answers

<p>In diplospory, the unreduced embryo sac is derived from the diploid megaspore mother cell, while in apospory, the nucellar cells give rise to apomictic embryo sac. Diplospory involves the formation of the embryo sac from a specific cell, whereas apospory involves nucellar cells.</p> Signup and view all the answers