What is meant by alternation of generation?
alternation of generations, also called metagenesis or heterogenesis, in biology, the alternation of a sexual phase and an asexual phase in the life cycle of an organism. The two phases, or generations, are often morphologically, and sometimes chromosomally, distinct.
What is meant by alternation of generations Class 11?
“Alternation of generations is a type of life cycle in which subsequent generations of plants alternate between diploid and haploid organisms.”
What is alternation of generation Class 11 explain?
Hint: Alternation of generation refers to the occurrence of diploid and haploid multicellular organisms, giving rise to new organisms. This process allows for both the dynamic and volatile action of sexual reproduction as well as consistence act of asexual reproduction. It is most commonly found in plants and algae.
What is alternation of generation Class 11 explain with example?
1. Alternation of generations is a term primarily used to describe the life cycle of plants. 2. A multicellular gametophyte, which is haploid with n chromosomes, alternates with a multicellular sporophyte, which is diploid with 2n chromosomes, made up of n pairs. 3.
What is a plant generation?
Alternation of generations describes a plant’s life cycle as it alternates between a sexual phase, or generation and an asexual phase. The sexual generation in plants produces gametes, or sex cells and is called the gametophyte generation. The asexual phase produces spores and is called the sporophyte generation.
What is alternation of generations quizlet?
Alternation of Generations. This term refers to the life cycle of most plants in which the generations alternate between haploid gametophytes and diploid sporophytes. All embryophytes and some algae undergo this process.
What is alternation of generation Brainly?
Answer. a pattern of reproduction occurring in the life cycles of many lower plants and some invertebrates, involving a regular alternation between two distinct forms. The generations are alternately sexual and asexual (as in ferns) or dioecious and parthenogenetic (as in some jellyfish).
What is alternation of generation in Class 11?
Why is alternation of generations important?
Plants alternate between the diploid sporophyte and haploid gametophyte, and between asexual and sexual reproduction. Therefore, the life cycle of plants is known as alternation of generations. The ability of the plants to reproduce sexually and asexually helps them to adapt to different environments.
Which best describes the alternation of generations?
which statement best describes the concept of alternation of generations there are two phases, a sporophyte and a gametophyte alternation of heteromorphic generations is common to all land plants an organ that is hygroscopic is all of the above
What kind of life cycle has true alternation of generations?
Alternation of generations is common in plants, algae, and fungi. This can be compared to the sexual reproduction in animals where both haploid and diploid cells are found in every generation. Plants alternate between the diploid sporophyte and haploid gametophyte, and between asexual and sexual reproduction. Therefore, the life cycle of plants is known as alternation of generations.
What are the stages in the alternation of generations?
Stages of Alternation of Generations. Following are the two stages of alternation of generations: Sporophyte Generation. Two haploid gametes fuse together to form a diploid zygote. This results in a sporophyte. The sporophyte is formed by multiple rounds of mitosis and is a multicellular organism.
What are two examples of alternation of generation in biology?
The diploid sporophyte has a structure called sporangium.