Answer:
4. Peptidoglycan
Explanation:
"Most bacteria can be broadly classified as Gram positive or Gram negative.
Gram positive bacteria have cell walls composed of thick layers of peptidoglycan.
Gram positive cells stain purple when subjected to a Gram stain procedure.
Gram negative bacteria have cell walls with a thin layer of peptidoglycan. The cell wall also includes an outer membrane with lipopolysaccharide (LPS) molecules attached."
Reference: Bailey, Regina. “Gram Positive vs. Gram Negative Bacteria.” ThoughtCo, ThoughtCo, 15 Oct. 2018
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Sensory nerves are present in the nervous system, these nerves sends the signal to the brain about hot,cold,etc.
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The correct answer is option (A) to discover new aspects of the natural world.
The study of rock formations and living organisms in previously unexplored water habitats helps a scientist to discover the newer aspects of the natural world. The unexplored water habitats are the best source to understand the newer aspects of the aquatic bodies like the new species of plants or animals, factors affecting the aquatic life and the different types interactions in the habitats. The study of rock also helps in the study of plants and animals, which were once a part of the habitat, now in the form of fossils.
Thus, the study of rock formations cannot explain the recently observed phenomena as they help in the study of fossils. The study of living organisms in previously unexplored water habitats cannot be applied to test the conclusions of prior investigations and test the predictions of current theories as they remained unexplored.
<span>The answer could be allopatric or sympatric speciation
depending on the cause of speciation. A population living in the same habitat
could be separated by a physical barrier hence restricting gene flow in the population.
On the other hand, sympatric speciation refers to the formation of different species
from a population that is in the same habitat and geographical area without any
physical separation. This could be due to differences in mating tendencies of individuals
in the population </span>
Answer:
Increasing surface water percolation and infiltration into the groundwater
Explanation:
