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Q. Explain about Tropical Rain Forests?
As you approach the equator the climate becomes increasingly hot and seasonal variation in climate decreases resulting in practically the same climate throughout the year. This tropical region abounds with life and thousands of species of plants and animals can be seen, though no species predominates. Tropical rain forests cover about 7 percent of the earth's surface but house approximately 40 percent of the plant and animal species. Tropical rain forests are found on both sides of the equator in South East Asia, Africa, South and Central America, North East Australia.
Both temperature and humidity are very high and constant. Rainfall exceeds 200 cm a year and is distributed over the year. Soil is nutrient poor because in spite of the high rate of decomposition the nutrients do not remain in the soil. They are absorbed rapidly by plants or the rains wash them away thus making the soil virtually useless for agriculture. There is a distinct stratification of vegetation in rain forests. The dominant plants in these forests are tall, 25-30 meters high with slender trunks that branch only near the tops forming a dense canopy of leathery evergreen leaves. The canopy blocks out most of the light, therefore, the forest floor is fairly open. Whatever the time of the year, some trees are flowering and some bear fruit.
Non-recurrent Type As mentioned earlier it refers to embryo development in reduced embryo sacs. The mechanisms identified for such cases are: Reduced Pseudogamy : The
Q. What is Barr body Genes? Located inside nuclear envelope, it's a densely staining object which is an inactivated X chromosome in female mammalian cells. Most Barr body genes
EVIDENC E IN FAVOUR OF THE MUTATION THOERY - Mutation theory can explain both progressive and retrogressive evolution and the occurrence of both changed and unchanged forms.
CONJUG A TE D PROTEINS Besides being made of polypeptides, the conjugated proteins posses additional groups, metals or ions. Consists of protein and non-protein parts.
Q. What are Dopaminergic neurons? Dopamine Dopaminergic neurons occur in two closely connected groups: Ventral tegmental area (VTA) of the midbrain and Substantia nigra,(i
What is the difference among cryptogamic and phanerogamic plants? Cryptogamic (hidden sex organs) plants are those that do not show flowers or seeds. They comprise the bryophy
what is a crabs excretory system?
According to the Mendel's second law, in the crossing between homozygous individuals concerning two pairs of nonlinked alleles, AABB x aaBB, what are the phenotypical and genotypic
1. Discuss how nursing has changed over the last two (2) decades. 2. Review and summarise the philosophy of your enrolled nurse course and its relevance to your clinical practic
What are the "chiasms" of homologous chromosomes seen in prophase I? Chiasms are intersections of two tracts in the form of X. The chiasms seen in prophase I are chromosome
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