IX. Mention the organism that possess the following:
1. Pseudopodia
2. Sporangium
3. Rhizoid
4. Chlorophyll
Answers
(1)..Pseudopodia: Pseudopods have two main functions: (1) locomotion and (2) capture of prey or engulfing of food. For instance, amoeba can crawl by extending the cytoplasm and the contraction of the filaments. The pseudopodbulge outward from the edge of the cell to pull in the entire organism as it goes forward.
(2)..Sporangium: the sporangium plays a role in asexual reproduction, and may play an indirect role in sexual reproduction. The sporangium forms on the sporangiophore and contains haploid nuclei and cytoplasm.
(3)..Rhizoid: Rhizoids are hair like structures present in lower forms such as algae, bryophytes, pteridophytes. These are not called as roots because unlike roots these are not very strong and do not have vascular bundles. Rhizoids are root-like structures that absorb water and nutrients.
(4)..Chlorophyll: Chlorophyll is a molecule produced by plants, algae and cyanobacteria which aids in the conversion of light energy into chemical bonds. Chlorophyll is known as a pigment, or molecule that reflects some wavelengths of light, while absorbing others.
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Explanation:
11th
Biology
Plant Kingdom
Bryophyta
Which one is a wrong statem...
BIOLOGY
Which one is a wrong statement?
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ANSWER
Brown algae is also known as phaeophyceae. It is a group of marine multi cellular algae, hits a critical role in marine environments. Its brown color is due to the presence of pigment fucoxanthin. It also consist of pigment chlorophyll a and c.
Archegonia is the female reproductive part of flask-shaped structure. It contains of neck and swollen base, where neck consist of one or more layers of cells ans swollen part contains of egg. It is found in Bryophtes (eg: ferns and mosses), gymnosperms (eg: cycads and conifers), and Pteridophyta (eg: azolla).
Gymnosperms doesn't have double fertilization, the endosperm is haploid and are formed by the repeated division of haploid megaspores and later develops into female gametophyte with haploid chromosomes.