Heredity and Evolution — Science STD 10 — Question

What is the effect on the magnetic needle in Oersted’s experiment, when (1) a current is passed through the wire (2) the current through the wire is increased (3) the current through the wire is stopped (4) the current through the wire is reversed (5) the distance between the magnetic needle and the wire is increased, keeping the current through the wire constant?

Write the characters of each of the following animals with the help of classification chart: Frog.

Define principal axis, principal focus and focal length of a convex lens.

Which are the reasons for endangering the many species of plants and animals? How can we save those diversity?

What is meant by dominant genes and recessive genes? Give one example of each.

i. Which substance is used to produce cheese?
ii. Which enzyme was used earlier for cheese production?
iii. Which enzyme is used to produce vegetarian cheese?

Write the answer of the question with reference to laws of gravitation.
State the universal law of gravitation.

(Nocardia, Geobacter, Ideonella sakaiensis, Pseudomonas, Alcanovorax borkumensis, hydrocarbonoclastic, Acidophillium, streptomyces)
Bacteria like ………… spp. and ………. have the ability to destroy the pyridines and other chemicals. Hence, these bacteria are used to clear the oil spills. These are called ………. bacteria. It has been observed that species like Vibrio, …………… can decompose the PET. Similarly, species of fungi like ………… have ability of decomposing rubber from garbage. Sulphuric acid is source of energy for some species of bacteria like ………… Hence, these bacteria can control the soil pollution occurring due to acid rain. …………..convert the salts of uranium into insoluble salts.