Question

hii guys plz tell me all answer plz plz tell fast class 9 cbse biology

Answer 1

1] Animals in the phylumPlatyhelminthes are called flatwormsbecause they are flattened from head to tail.
2) A lichen, or lichenized fungus, is actually two organisms functioning as a single, stable unit. Lichens comprise a fungus living in a symbiotic relationship with an alga or cyanobacterium (or both in some instances). There are about 17,000 species of lichen worldwide
3) Fungi are heterotropic eukaryotes organisms. They use decaying organic material as their food so they arecalled saprophytes. 
4) Algae are single cell organisms which need to live in well lit areas to ensure that they can make their food. They contain photosynthetic pigments which is the only way they are able to make their food. This is the main reason why they thrive on the surface of water where they have more access to light.
5) A) Amphibians are those organisms which live on both land and in water.Bryophytes are called amphibians of the plant kingdom because theseplants though live in soil but they need water for sexual reproduction. The sperm of bryophyte (antherozoids) are flagellate and need water to swim to the eggs.
B) Cycads,ginkgo,gnetale
6)
Cryptogamae (Crypto= hidden Gamae= marriage) means Plants that do not bear seeds. Thallophytes, Bryophytes and Pteridophytes reproduce mostly by seed like structures called Spores. Thus they do not produce seeds. Hence they are Cryptogams
Angiosperms and gymnosperms are seed-bearing plants. ... Another characteristic of angiosperms is the flowers and production of fruits. But, in gymnosperms seed are not included in a fruit. Angiosperm. The word angiosperm derived from Greek meaningcontainer.
7)Thallophytes have simple body (thallus) and their gametes are unicellular. After fertilisation, the zygote does not formembryo. Therefore, these plants arecalled non-embryonic plants.
8)Historically, bacteria were first classified as plants constituting the class Schizomycetes, which along with the Schizophyceae (blue-green algae/Cyanobacteria) formed the phylum Schizophyta, then in the phylumMonera in the kingdom Protista by Haeckel in 1866, comprising Protogens, Protamaeba, Vampyrella, Protomonae