The question asks about the implications of creating anti-matter, specifically anti-helium nuclei. We need to evaluate each given statement based on our understanding of anti-matter and its current scientific applications and theoretical significance.
B) 2 and 3 only. Statements 2 and 3 correctly identify the scientific implications of anti-matter research. The creation of anti-matter helps in probing the existence of anti-stars/galaxies and understanding the universe's evolution, particularly the matter-antimatter asymmetry.
The question asks for evidence supporting the continued expansion of the universe. We need to identify which of the given phenomena are recognized by scientists as indicators of cosmic expansion.
A) 1 and 2 are the correct evidences. The Cosmic Microwave Background (CMB) radiation (1) is a direct relic of the Big Bang and its expansion, and the redshift phenomenon (2) observed in distant galaxies is the primary observational evidence for the universe's ongoing expansion.
The question asks about the roles and responsibilities of an Accredited Social Health Activist (ASHA) under the National Rural Health Mission (NRHM). To answer this, one needs to know the specific functions assigned to ASHAs as community health workers.
Based on the analysis, statements 1, 2, and 3 are correct, while statement 4 is incorrect.
Correct Option: A) 1, 2 and 3 only
The question asks about the primary elements responsible for the origin of life on Earth. This refers to the fundamental building blocks of organic molecules that constitute living organisms. We need to identify the set of elements that are most crucial and abundant in these early organic compounds.
Correct Option: B) Carbon, Hydrogen, Nitrogen
The problem requires determining the correct direction to walk to a village located 5km east of the current position, using the Polestar as a guide. The Polestar (Dhruv Tara) is known to indicate the North direction in the Northern Hemisphere.
Imagine standing and facing the Polestar (North). Your right hand points East, and your left hand points West. To walk East, you need to turn 90 degrees clockwise from North. This means the Polestar (North) would then be to your left.
C) direction keeping the polestar to his left
If the Polestar is kept to the left, the person is facing East. Since the village is 5km East, this is the correct direction to walk.
The question asks about the capabilities of Recombinant DNA technology (Genetic Engineering) in transferring genes. We need to evaluate each statement to determine if such gene transfers are possible.
Genetic engineering is widely used to transfer genes between different plant species. For example, genes for herbicide resistance or pest resistance (like Bt genes) are often transferred from one plant species to another, or from bacteria to plants, to create genetically modified crops. This demonstrates that genes can be transferred across different species of plants.
While less common than plant-to-plant or microorganism-to-plant transfers, it is scientifically possible to transfer genes from animals to plants using genetic engineering techniques. For instance, there have been experimental attempts to transfer genes encoding animal proteins into plants for various purposes, such as producing pharmaceuticals. The fundamental principles of genetic engineering allow for such cross-kingdom transfers.
This is a very common application of recombinant DNA technology. A prime example is the transfer of the Bt gene (from the bacterium Bacillus thuringiensis) into cotton plants (a higher organism) to make them resistant to insect pests. Similarly, human insulin is produced in bacteria (microorganisms) by inserting the human insulin gene into their genome. This clearly shows that genes can be transferred from microorganisms to higher organisms (both plants and animals).
D) 1, 2 and 3 — All three statements correctly describe capabilities of Recombinant DNA technology. Genes can be transferred across different species of plants, from animals to plants, and from microorganisms to higher organisms.