“Learn about evolution, the process by which species adapt and change over time through natural selection and genetic variation.”
Biology Class 12 Chapter 10 Notes
A general formula called the hard-Weinberg equation is used for calculating the frequencies of alleles and genotypes in populations at: Equilibrium
Evolutionary relationships among species are reflected in their: DNA and proteins
In Meselson ansd stahl experiment, the DNA from sample at 20 minutes, after centrifugatioon it made sediments at the: Intermediate
In hershey & chase experiment, 32p labeled bacteriophages allowed to infect the becteria.During analysis 32 p activity wa detected: Inside the becteiral cell
A chromosome with unequal length of its arm is called: Sub metacentric
If the amount of adenine in DNA of a bacterial cell is 36% of the total nitrogenous bases, what will be the amount of guanone in the DNA of a cell in next generations: 14%
Gene pool consists of all alleles at all gene loci in all individuals of the: Population
In man the vestigial organs are: Coccyx
According to one of the speculations life may have begun deep in the oceans in underwater hot springs called hydrothermal: Vents
Archaebacteria tolerate temperatures up to: 120oC
In eukaryotic mRNA molecule there are 90 nucleotide involved in translation process. What is the number of amino acid in the protein formed by this mRNA molecules: 30 Amino acids
In Griffith experiment mice developed pneumonia when they were injected with: Heat killed S-type becteria along with live R-type bacteria
Endangered species of plants have been recorded to more than: 500
The total aggregate of genes in a population at any one time is called the populations gene: Pool
Eukaryotes are thought to have first appeared about____billion years ago: 1.5
The parts of the body used extensively to cope with the environment become larger and stronger while those that are not used deteriorate was argued by: J.B Lamarck
Armadillos the armoured mammals live only in the: America
Which one of the fllowing acts as a stop codon: UAG
If all members of a population are homozygous for the same allele that allele is said to be: Fixed in the gene
Among the birds Drawin collected 13 types of: Finshes
The most threatened areas on the earth have been reduced to 44% of their original extent are: Tropical rain forests
Some amoeboflagellates ingested cyanobacteria and led to the development of: Mitochondria
In mitochodria UGA codon act to specify __________ instead stop codon: Trytophan
Jean Baptiste Lamarck published his theory of evolution in: 1809
If an mRNA is synthesized with the differnt codons, what is the minimum number of amino acids in the protein that is formed by the mRNA: 64 Amino acids
In the eighteenth century organisms were classified by: Carolus Linnaeus
If the condon consisted of only two nucleotides, there would be how many possible condons: 8
A group of individuals belong to a particular species and sharing a common geographic area is called: Population
Homologous structures represent: divergent evolution
Endangered species of plants have been recorded to more than: 500
Tubes that connect the middle ear with the throat in humans are called: eustachian tube
Some individuals leave behind more progeny than others and teh rate at which they do so is affected by their inherited characteristics. This is called: Selection
Endangered species of plants have been recorded to more than: 500
The total aggregate of genes in a population at any one time is called the populations gene: Pool
If the condon consisted of only two nucleotides, there would be how many possible condons: 8
Armadillos, the armored mammals live only in: America
Evolutionary relationships among species are reflected in their: DNA and proteins
Important : Review all previous years’ 12 class past papers for comprehensive practice and better exam preparation.