BIOLOGY 1 Marks Question

Those organs whose basic structure and origin are different but have same function are called analogous organs. This similarity of body parts is called analogy. Example, wings of butterfly, bird and bat.

Approximately 900 cc.

The thorn of Bougenvillia and the tendril of Cucurbita are homologous organs and this similarity has brought through divergent evolution.

In evolutionary biology, mimicry is a similarity of one organism, usually an animal, to another, that has evolved because the resemblance is selectively favoured by the behaviour of a shared single receiver that can respond to both.

Lichen are the indicator of industrial pollution.

The theory of biogenesis was given by Harvey and Huxley.

Hugo de Vries.

In human being, about 180 vestigial organs are found in body some of which are as follows : 1. Vermiform appendix 2. Earpina 3. Candal vertebra 4. Nicititating membrane 5. Hairs 6. Wisdom tooth 7. Cervical fistula 8. Extra nipple 9. Rudimentary Gill slits

Thorn of Bougainvillea and tendril of Passifloraare modified branches and axillary in position where as phylloclade of opuntia and cladode of Ruscus are example of homologous organ/divergent evolution.

Dryopithecus were more like ape whereas Ramapithecuswere more like man.

Louis pasteur

Dryopithecus

(1) Presence of thick body hair.
(2) Both move like gorilla and chimpanzee.

Neanderthal man had the cranial capacity of 1400cc

Fleeper of whale and wings of birds.

Louis Pasteur opposed the theory of spontaneous generation.

Palaentology is the branch of biology in which Fossil are studied.

Cromagnon on the basis of consuming human food was Carnivor.

Atavism

Australopithecus at first started bepedal locomotion.

Beagle

Mesozoic era

There are four races evolved due to Migration of Homo Sapiens and these are Nigroid, Australoid, Caucasoids and Mongoloids.

Branching decent and natural selection are the two main concepts of Darwinism.

Louis Pasteur proved the theory of spontaneous generation wrong.

Sudden heritable changes in the genetic material that is DNA of the organisms called mutation.

According to Charles lyell-The remains or impressions of the hard part of the past individual in the strata of the earth are called fossils.

Only those organism survive in the nature whofit and adapt themselves in accordance to the nature. This ability is known as the survival of fittest.

Those organism which share the character of two groups are known as connecting link for example: Aracheopteryxshares the character of both reptile and birds hence it is considered as connecting link between reptile and birds.

The eyes of octopus and mammals are an example of analogy.

Big Bang Theory.

The distance of stars are measured in light years.

Ramapithecus has been considered as sub-human and Australopithecus has been considered as primitive human.

The Earth originated from the Milky Way Galaxy.

Cromagnonman is the closest ancestor of modern man.

The scientific name of modern man is Homo- sapiens.