Answer:
Cell fractionation allows to study the different parts of a cell in isolation.When the organelles have been isolated, you can see which organelles make the most energy.
Answer:
It needs the spines for protection
Explanation:
The cactus would develop the spines as a form of protection to protect itself from being consumed and to survive longer.
Answer:
The above paragraphs describes that how salt- and fresh-water fish regulates their osmoregulation. Hence, the correct answer would be c. have adapted to deal with osmosis.
Osmosis is the process by which solvent's molecule move from region of low concentration (hypo-tonic) to the region of high concentration (hyper-tonic) through a semi-permeable membrane.
In sea-water fishes, the body fluids are hypo-tonic to the surrounding water and thus water is kept moving out of their gills. In order to prevent the excess water loss they need to drink water constantly and excrete concentrated urine.
In contrast, fresh-water fishes body fluids are hyper-tonic to surrounding water and hence, water keeps entering in their body through gills. So, in order to prevent excess dilution they absorb salt from surrounding with the help of gills and also their bodies reabsorb salt from urine.
The right answer is false.
All the physical characteristics of an individual, which are at the basis of genetic characters (sometimes even epigenetic), are transmitted to his offspring.
Classical or monogenic Mendelian inheritance is based on the transmission of a single gene in a dominant, recessive mode, linked to the sex chromosome X (or Y), or more rarely mitochondrial (extranuclear) chromosome.
