Phylum Flashcards
Nematodes reproduce through a process called
Parthenogenesis i.e reproducing without mating
Nematodes life cycle duration depends on____
The species and environmental conditions
How do nematodes move?
They move using a mechanism called sinusoidal locomotion i.e a rhythmic, wave like motion to navigate their environment.
How do nematodes move?
They move using a mechanism called sinusoidal locomotion i.e a rhythmic, wave like motion to navigate their environment.
Life cycle of nematodes
Egg
Four juvenile stage(L1 to L4)
Adult stage
Features of nematodes
Dioecious(separate sexes)
False body cavities (pseudocoelom)
Bilateral symmetrical with cuticle covering on the body
Direct fertilization of eggs
Classes of nematodes
Aphasmidia ( lack phasmids, caudal sensory neurons)
Phasmids
Division of phylum protozoa
Sarcomastigophora
Ciliophora
Classification of Sarcomastigophora
Mastigophora which is sub divided into phytomastigophora and zoomastigophora
Sarcodina
Opalinata
Two processes involved in binary fission
Ookinesis — division of nucleus into two
Cytokinesis — cytoplasmic division
Plant features of euglena
- Pyrenoid glands for storing of starch
- Presence of chloroplast
- Holozoic nutrition
Animal features of euglena
- Eyespots
- Pellicle(skin covering)
- Heterotrophic nutrition
Which phylum marks the beginning of cephalization
Phylum platyhelminthes
In phylum platyhelminthes,flame cell is responsible for ______
Excretion and osmo-regulation
Presence of ______enables phylum platyhelminthes to take in food
Muscular suctorial pharynx
______ is the amphibian of plant kingdom
Bryophytes
Why is bryophytes called amphibians of plant kingdom?
Bryophytes are called amphibians of plant kingdom because they reproduce sexually in water.
The process of fertilization in angiosperms is referred to as _____
Double fertilization
The larva form of annelid is _____
Trocophore larva
