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Phylum platyhelminthes (13,000 species Flatworm)
The body is flattened. Gastrovascular cavity is branched, dense bodies with many cell layers, mouth but no anus. Hermaphrodite often with elaborate precautions for minimising self-fertilisation. Phylum contains many important parasites.
Three classes:
Turbellaria
Trematoda
Cestoda
general charactres and classfication
when pollen tube enters the embryo-sac,it has;
What are the genotypes and respective blood types of the ABO system? Ever since the alleles are IA, IB and i the possible genotypes are IAIA (blood type A), IAIB (blood type AB
Q. Does the DNA replication occur in the cell division? Yes. The DNA replication occurs in mitosis as well in the meiosis.
Only during recent years, due to commercialization of agriculture, more emphasis has been given on cash crops, which contribute very little to the animal food. As a result, the liv
Inter-relationships of Classification The aim of classification is to put together organisms on the basis of their similarities. But the question is what type of similarities?
57. While planning for an artificial hybridisation programme involving dioecious plants, which of the following steps will be irrelevant A usting of pollen on stigma B Collection
WAXES These are monoglyceride compounds. They are chemically inert (due to absence of double bonds) and insoluble in water. On heating they become soft and pliable
Question 1: (a) In what ways does poverty lead to environmental degradation? (b) What types of problems do the rural and urban poor share? Give some differences in the condi
Which of the structures are (a) in plant and animal cells, (b) in plant cells but not in animal cells? a) Plant and animal cells having cytoplasm, cell membrane, mitochondria,
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