Table of Contents
What structures do paramecia use for protection?
Paramecium wears a soft armor, called pellicle The body of the paramecium cell is enclosed by a stiff but elastic membrane, called pellicle. Pellicle is made up of a thin, gelatinous substance produced by the cell. The layer of the pellicle gives the paramecium a definite shape and good protection of its cell content.
What process allows paramecia to exchange genetic material with other paramecia?
A paramecium can also exchange genetic material with another via the process of conjugation.
Which protist has silica in its cell walls?
Diatoms are beautiful photosynthetic algal protists that come many shapes and sizes. These organisms have a unique cell wall made of silica glass called a frustule.
Does paramecium have lysosomes?
Food vacuoles encapsulate food consumed by the paramecium. They then fuse with organelles called lysosomes, whose enzymes break apart food molecules and conduct a form of digestion. Perhaps the most unusual characteristic of paramecia is their nuclei.
Does algae have a cell wall?
Like plants, algae have cell walls. Algal cell walls contain either polysaccharides (such as cellulose (a glucan)) or a variety of glycoproteins (Volvocales) or both. The inclusion of additional polysaccharides in algal cells walls is used as a feature for algal taxonomy.
What is the function of the Macronucleus?
The macronucleus is the centre of all metabolic activities of the organism. The micronucleus is a storage site for the germline genetic material of the organism. It gives rise to the macronucleus and is responsible for the genetic reorganization that occurs during conjugation (cross-fertilization).
Why do algae absorb more light than other organisms?
Photosynthesis and light-absorbing pigments. Since the amount of light absorbed depends upon the pigment composition and concentration found in the alga, some algae absorb more light at a given wavelength, and therefore, potentially, those algae can convert more light energy of that wavelength to chemical energy via photosynthesis.
How are the pigments of algae different from land plants?
Photosynthesis and light-absorbing pigments. The light reactions of many algae differ from those of land plants because some of them use different pigments to harvest light. Chlorophylls absorb primarily blue and red light, whereas carotenoids absorb primarily blue and green light, and phycobiliproteins absorb primarily blue or red light.
How does green algae use chlorophyll for photosynthesis?
Green algae in the genus Hyalotheca, a group of filamentous desmids (class Charophyceae), use chlorophyll to capture energy from sunlight for photosynthesis.Courtesy of Robert A. Andersen. Photosynthesis comprises both light reactions and dark reactions (or Calvin cycle).
What kind of pigments are used in photosynthesis?
Photosynthesis and light-absorbing pigments. Chlorophylls absorb primarily blue and red light, whereas carotenoids absorb primarily blue and green light, and phycobiliproteins absorb primarily blue or red light. Since the amount of light absorbed depends upon the pigment composition and concentration found in the alga,…
https://www.youtube.com/watch?v=4CPv3XWE55U