Give three reasons why a snail and an Octopus are classified under the same phylum?

Given three reasons why modulation of a message signal is necessary for long distance transmission.

Give three examples of sentences which are not statements. Give reasons for the answers.

Give one reason why a finely divided substance is more effective as an addorbent?

Give reason why a finely divided substance is more effective as an adsorbent.

Give reasons why: (i) Most zygotes in angiosperms divide only after certain amount of endosperm is formed. (ii) Groundnut seeds are exalbuminous and castor seeds are albuminous. (iii) Micropyle remains as a small pore in the seed coat of a seed. (iv) Integuments of an ovule harden and the water content is highly reduced, as the seed matures. (v) Apple and cashew are not called true fruits.

Which of the following arguments are correct and which are not correct? Give reasons. i) If two coins are tossed simultaneously there are three possible outcomes - two heads, two tails or one of each. Therefore, for each of these outcomes, the probability is 1/3 ii)If a die is thrown, there are two possible outcomes - an odd number or an even number. Therefore, the probability of getting an odd number is 1/2

What is a reversible reaction? What is rate of a reaction? Would you get the same result during heating of CaCO_3 separately in an open container and a closed container? Give reason.

А game consists of tossing a one rupee coin 3 times and noting its outcome each time. Deskhitha wins if all the tosses give the same result i.e., three heads or three tails, and loses otherwise. Calculate the probability that she will lose the game.

Study the figures below and answer the following : (a)Mention the specific geographical region where these organisms are found. (b)Name and explain the phenomenon that has resulted in the evolution of such diverse species in the region. (c )Explain giving reasons the existance of placental wolf and Tasmanian wolf sharing the same habitat.

Give at least three reasons behind Mendel's success in formulating Law of inheritance.