The major unifying feature of Aschelminth is the presence of pseudocoelom. In pseudocoelom, scattered pouches of mesoderm are present between... View Article
Aschelminthes are called pseudocoelomates because they do not possess true coelom. The mesoderm is present as scattered pouches between ectoderm... View Article
No, earthworms are coelomates. They possess true coelom, which is lined by mesoderm. They belong to the phylum Annelida. Also Check: What... View Article
Yes, some of the nematodes live as parasites in the human intestines. E.g. Ascaris lumbricoides (roundworm), Enterobius vermicularis (pinworm),... View Article
Larynx is present between the pharynx and trachea of the human respiratory system. The main function of the larynx is sound production. It... View Article
When the body cavity is not lined by mesoderm and is present as scattered pouches between ectoderm and endoderm, it is called pseudo coelom.... View Article
The two basic factors of evolution are natural selection and variation, on which natural selection operates. Also Check: How Does Variation... View Article
In absence of allolactose or lactose, the repressor binds to the operator and inhibits the transcription of the operon by RNA polymerase. Lactose... View Article
Mendelian traits are those traits, which are governed by a single gene having two alleles, with one completely dominant over the other. Some of... View Article
The major driving force of ascent of sap is transpiration pull or transpiration through leaves. Cohesion-tension theory explains the pulling of... View Article
The largest reservoir of nitrogen on Earth is N2 gas present in the air. The air in Earth's atmosphere is composed of around 78% nitrogen gas.... View Article
When oxygen is absent, the end product of glycolysis, i.e. pyruvate is converted to lactic acid or ethanol and CO2 by fermentation. It is called... View Article
Interphase is the resting phase of a cell cycle and it accounts for more than 95% duration of the cell cycle. The interphase is divided into... View Article
Glycolysis is a ten-step process, which produces two pyruvate molecules on partial oxidation of glucose. Total 4 ATP molecules are produced in... View Article
ATPs are produced in the mitochondria during cellular respiration. Most of the ATPs are produced in the electron transport system by oxidative... View Article
Meiosis II occurs in the secondary oocytes. Meiosis II is arrested at the metaphase II stage and is only completed after the penetration of sperm... View Article
The rate of transpiration is regulated by the opening of the stomata. In general, light stimulates the opening of stomata and during daylight,... View Article
The wall of the alimentary canal is made up of four layers. They are serosa, muscularis, submucosa and mucosa from outer to the inner layer.... View Article
Endocytosis is the process of internalisation of substances in the cell. The three types of endocytosis are pinocytosis, phagocytosis and... View Article