Question

Name the algae, which have food conducting tubes similar to phloem in vascular plants.
A. Red algae
B. Brown algae
C. Blue green algae
D. Green algae

Answer 1

Hint: In some huge brown growth, certain cells are altered into long fibers called trumpet hyphae. These act as phloem in vascular plants conveying food from lamina to the holdfast.

Complete step by step answer: The Phaeophyceae or brown algae (solitary: alga), is an enormous gathering of generally marine multicellular algae, including numerous kelp of colder Northern Hemisphere waters. They assume a significant part in marine conditions, both as food and for the natural surroundings they structure. For example Macrocystis, a kelp of the order Laminariales, may arrive at 60 m long, and shapes noticeable submerged woods. Another model is Sargassum, which makes extraordinary natural surroundings in the tropical waters of the Sargasso Sea. Many brown algae, for example, individuals from the order Fucales, generally develop along rough beaches. A few individuals from the class, for example, kelp, are utilized as nourishment for people.
Overall there are around 1500–2000 types of brown algae. A few animal varieties are of adequate business significance, for example, Ascophyllum nodosum, that they have gotten subjects of broad examination in their own right.
Brown algae have a place with an enormous gathering, the Heterokontophyta, an eukaryotic gathering of life forms separated most conspicuously by having chloroplasts encircled by four layers, proposing an origin from a harmonious connection between a basal eukaryote and another eukaryotic creature. Most brown algae contain the pigment fucoxanthin, which is answerable for the particular greenish-brown shading that gives them their name. Brown algae are one of a kind among heterokonts in forming into multicellular structures with separated tissues, yet they reproduce by methods for flogged spores and gametes that intently look like cells of different heterokonts. Hereditary investigations demonstrate their nearest family members to be the yellow green algae.
So, the correct answer is “Option B”.

Note: The division phaeophyta incorporates the brown algae. The division comprises around 2000 species, the majority of which are marine. The enormous estimated brown algae are known as kelps. The biggest brown algae accomplish a length of 40-60 meters. Brown algae are consistently multicellular. The brown algae contain the earthy colored shade fucoxanthin and chlorophyll a and chlorophyll c. Their food is lipid and laminarin. The huge estimated brown algae or kelps have food leading tubes, like phloem of vascular plants. They are named trumpet hyphae. brown algae cell walls are made of cellulose. Outside the cellulosic walls there is a colloidal covering consisting of a blend of polysaccharides, called phycocolloids. It prevents drying or freezing of the alga. While some brown algae increase by fracture, others replicate by sexual methods. Ectocarpus has isomorphic alternation of generation. Fucus is diploid and has a diplontic sort of life cycle.