All organisms arose from a single common ancestor.
An endosymbiont or endobiont is any organism that lives inside the frame or cells of some other organism most often, though no longer continually, in a mutualistic relationship.
Bacterial endosymbionts result in dramatic phenotypes in their arthropod hosts, including cytoplasmic incompatibility, feminization, parthenogenesis, male killing, parasitoid protection, and pathogen blocking.
Endosymbionts, such as Wolbachia, Rickettsia, and Cardinium, are a type of bacteria generally located in arthropod species inclusive of bugs, spiders, crustaceans, and mites, in addition to other invertebrates along with filarial nematodesEndosymbiosis is a form of symbiosis in which the symbiont lives in the body of its host and the symbiont in an endosymbiosis is known as an endosymbiont.
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Answer: Polygenic inheritance
Explanation:
Polygenic inheritance is a phenomenon that explains how a character like skin color show a range of more or less continuous variation due to many genes controlling it. And this is unlike Mendel traits that are controlled by single genes.
So, skin color in an individual is expressed as red hair and pale skin.
Explanation:
(a) Silicosis is a situation in which the person work in stone grinding industries, they tend to inhale the crystalline silica dust, which is also a part of sand and rock. It affects the human lungs and can cause lung fibrosis.
(b) Benzoates, Nitrates, sulphites are the food preservatives chemicals which are used mostly in food preparation so that it can be stored for long period. These chemicals are harmful for human and can cause disease in the human. They can cause severe asthma in humans. The international agency for the research of cancer has reviewed ingested nitrates and nitrites are probably carcinogenic to humans.
(c) Industrial pollution cause water and soil pollution. Industrial pollution is the release of wastes and pollutants generated by the industrial activities into the natural environmental including air, water and sand. It causes chronic health problems. Polluted air cause lung related issue and polluted water causes abdominal pain, diarrhea in humans
Answer:
The correct option is option b that is<em> Homo erectus</em> is the common ancestor of<em> Homo neanderthalensis</em> and<em> Homo sapiens.</em>
Explanation:
<em>Homo erectus </em>appears about 2 mya, possibly during the Pleistocene epoch and are considered as direct ancestor of human.They are called as upright man as they use legs for walking without any support.They are thought to be capable of doing certain things like hunting, starting fire,art making, create speech etc.
<em>Homo neanderthal</em> was the most recent ancestor species of modern human as they appear about 40,000 years ago.
They became extinct as they did't fight against environmental hazards and the major cause of their extinction that scientists have claimed that they did't adapt the modern techniques that the modern human does.
