Answer:
They are neutrophils, eosinophils, basophils, lymphocytes, and monocytes.
Out of these ones the T-cells are responsible for recognizing antigens on the surface.
Explanation:
T cells
Killer T cells
Killer or cytotoxic T cells scan the surface of cells in the body to see if they have become infected with germs, or if they have turned cancerous. If so, they kill these cells.
Helper T cells
Helper T cells "help" other cells in the immune system to start and control the immune response against foreign substances.
Regulatory T cells or Tregs
Tregs control or suppress other cells in the immune system. They have both helpful and harmful effects.
Memory T cells
Natural killer T cells
Explanation:
the first step in nitrogen cycle is formation of nitrates it is done by following ways.1. NITROGEN FIXATION: conversion of nitrogen into nitrates is called nitrogen fixation. it is done by three ways which include atmospheric nitrogen fixation(done by thunderstorms and lightning),biological nitrogen fixation(done by nitrogen fixing bacteria),industrial nitrogen fixation(done in industries). 2.AMMONIFICATION AND NITRIFICATION: ammonification is the breakdown of proteins and nitrogeneous wastes and nitrification is conversion of ammonia into nitrates and nitrites this procces is done by bacteria. the second step is assimilation in which the nitrates formed in the above procces are used by plants and in the third procces which is denitrification in which the nitrates are again converted into atmospheric nitrogen. I THINK IT WOULD BE HELPFULL TO YOU
Answer: geographic isolation
Explanation:
Due to the geographic isolation experienced by these population of finches, they therefore developed beaks adapted to the food source available to them dude to natural selection. Thus the successful finches had the useful beach needed for their survival on the various highland and then reproduced among themselves fixing that adaptation thus giving rise to difference populations of finches long on the various islands of the galapagos.
The given blank can be filled with Cones.
The visual acuity can be defined as the clarity of the vision, it is related to the sharpness and the clearness of the image formed. The vision acuity is determined by the optical and the neural factors, it is dependent on the retinal focus and the sensitivity of the nerve cells and the brain.
The cones are the pointed, thick and short sensory receptors, present in the eye. They are responsible for the color vision and the sharpness or the acuity of the image. They work better in brighter light.
Answer:
The correct answer is "Fist sequence; Fourth sequence; Second sequence; Third sequence".
Explanation:
Inversion of DNA is a process that often occurs during evolution of chromosomes. It occurs when the breakage of a chromosome in two places, results in the reinsertion of a DNA but in a reversed fashion. The evolutionary order of predecessors of inversion of DNA can be established by looking on the number of nucleotides that are different in the sequences of DNA. In this case, the first sequence is the ancestor and it haves the sequence "ABCDEF". The second in the evolutionary order is the fourth sequence since it originates from the first sequence only by changing the "BC" nucleotides to the end of the sequence "ADEFBC". The third in the evolutionary order is the second sequence since it still starts in AB, but has the other four nucleotides different: "ABFEDC". The last in the evolutionary order is the third sequence, which is completely different and reversed respect to the first sequence: "FEDABC".
