help with biology 1

a) In honey bees (Apis indica) larvae are fed by the workers and the development depends on nature of food provided to the larvae. b) In birds like sparrow, weaver bird, pigeon etc. the hatchlings are naked, blind and need more parental care. Such young ones are called altricial or nidico..

Hunting for food (subsistence hunting) trade (commercial hunting) and fun (sport hunting) has resulted in the decrease of species. Examples: Dodo, cheetah, musk deer and blue whale..

These cancers are located in the epithelial lining of internal organs or glands. For e.g., Breast cancer, Stomach cancer etc., Cancers of epithelial glands are called Adenoma. About 85% of all tumours are of this kin..

In this type, regeneration occurs mainly by the remodelling of existing tissues and the re-establishment of boundaries, thus involving very little new growth. As a result, the regenerated individual is much smaller initially. It subsequently increases its size and becomes normal after feeding. This..

Here immuno potentiating agents like preformed anti bodies or drugs are administered. This helps to improve immune respons..

Myogenic mechanism helps to control variations of the blood flow to the glomerulus due to fluctuations in blood pressure. An increase in blood pressure makes the wall of the afferent arteriole contract thus reducing the diameter of the arteriole and increasing the resistance to flo..

These chromosomes occur in the oocytes (germcells in the ovary) of amphibians and in some insects. They are extremely large synapsed homologous chromosomes which can be seen in the diplotene stage of prophase-I in meiosis. They measure about 1500 to 2000 in length. A lampbrush chromosome consist..

According to this theory, biological clocks act through hormones, which are the secretions of the endocrine glands, to control the pace of ageing. It has been observed that the production of some of the hormones declines with age. Human growth hormone (GH) levels decrease with age. Sex ho..

In C 3 plants, the rate of photosynthesis increases with an increase. In CO 2 concentration upto 500 m l.l - 1 . In C 4 plants, photosynthetic rate increases with an increase in CO 2 concentration. However these plants attain saturation at around 360 m l.l -1 (as compar..