Which of the following statements is not true? Write it.
1. Malthus theory was written in An essay on the principles of population.
ii. The orgini of species was written by charles Lyell.
iii. The theory of Natural selection was proposed by charles Darwin.
iv. jean Baptist lamark proposed a theory of inheritance of acquired characters.

Which of the following statements about natural selection are correct? ( i) Tends to increase the characters that enhance survival and reproduction (ii) Causes adaptation (iii) Acts on an organism's phenotype (iv) Was considered as mechanism of evolution by Darwin

If the theory of inheritance of acquired characters proposed by Lamark was true how will the world be?

According to molecular orbital theory, atomic orbitals of nearly same energy of different atoms are combined and form molecule. In homodiatomic molecule two atomic orbitals which have wave function psi_(A) and psi_(B) are combined in two ways (psi_(A)pm psi_(B)) . They have two type of electron density, one is bonding [(psi_(A) pm psi_(B))^(2)] where e- density increase between nucleus. Another is antibonding [(psi_(A)pm psi_(B))^(2)] where e^(-) density decreases between nucleus. These molecular orbitals are filled according to Hund, Pauli, afbau principle. Existence of molecule depends on bond order. where bond order = ("Number of bonding "e^(-)"s- number of antibonding "e^(-)s)/(2) lf the molecule have unpaired electron it is paramagnetic otherwise diamagnetic Statement- 1: Removal of two e^(-) from N^(2) , magnetic behaviour does not change while addition of two electrons in O_(2) magnetic behaviour changes. Which of the following correct trends of bond energy is possible to explain by following statement. "Successive filling of antibonding orbital reduce the bond energy between two atoms"? (I ) N_(2) gtgt O_(2) gtgtF_(2) (II) O_(2)^(+) gt O_(2) gt O_(2)^(-) (III) C_(2)^(2) gt C_(2) (IV) CI_(2) gt Br_(2) gt F_(2)