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Biology 2 - PPT - 01

🧬📗1️⃣ Module 4 - POWERPOINT SLIDES - SET 1

QuestionAnswer
What is reproduction? The biological process by which organisms produce new individuals to ensure continuation of the species.
What is asexual reproduction? A mode of reproduction where a single parent produces genetically identical offspring without gametes or fertilization.
What is sexual reproduction? A mode of reproduction where two parents contribute gametes that combine to form genetically diverse offspring.
What is the sporophyte generation? The diploid (2n) generation in plants; dominant in flowering plants and produces spores.
What is the gametophyte generation? The haploid (n) generation in plants that produces gametes.
What is a microspore? The male haploid spore that develops into pollen grains.
What is a megaspore? The female haploid spore that develops into the embryo sac.
Where is the megaspore located? Inside the ovule within the ovary.
How many megaspores are produced after meiosis? Four megaspores.
How many megaspores participate in fertilization? Only one; the other three degenerate.
How many nuclei are produced after the megaspore undergoes 3 rounds of mitosis? Eight haploid nuclei.
What are the categories of nuclei in the embryo sac? Egg cell, synergids, antipodal cells, and polar nuclei.
What does the pollen grain contain? A tube cell and a generative cell.
What is the function of the tube cell? It forms the pollen tube for sperm delivery.
What is the function of the generative cell? It divides to form two sperm cells.
What is double fertilization? One sperm fertilizes the egg; the other fertilizes the polar nuclei to form endosperm.
What is vegetative propagation? Asexual reproduction where new plants grow from stems, roots, or leaves.
What are runners or stolons? Horizontal stems that produce new plants at nodes.
What are rhizomes? Horizontal underground stems that produce new shoots and roots.
What are tubers? Swollen underground stems that store nutrients and can produce new plants.
What are bulbs? Short stems surrounded by fleshy leaves that store food and grow into new plants.
What is parthenogenesis? Development of an unfertilized egg into a complete individual.
What does dioecious mean? Species with separate male and female individuals.
What does monoecious mean? Individuals with both male and female reproductive organs.
What is external fertilization? Gametes unite outside the body.
What is internal fertilization? Gametes unite inside the body.
What is oviparity? Eggs are laid outside the mother’s body.
What is ovoviviparity? Eggs develop inside the mother but nourishment comes from the yolk.
What is viviparity? Young develop inside the mother and receive nourishment from her blood.
What is budding? Asexual reproduction where a new individual grows as a bud and detaches.
Created by: francisslavin002
 

 



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