When an environment is hypotonic, the cell has more solute so solvent move from outside the cell to inside causing the cell to swell.
WHAT IS TONICITY?
- Tonicity is the ability of a solution to induce water loss or water gain in a cell. A solution can either be; hypertonic, hypotonic or isotonic
- A hypertonic solution has more concentration of solute than its surroundings while a hypotonic solution has less concentration of solute compared to it's surroundings.
- If a hypotonic solution has less solute, this means that it will have more solvent (water). Based on the principle of osmosis, water moves from a region of high concentration to region of low concentration.
Hence, water will move into a cell that is located in a hypotonic environment, causing it to swell.
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Answer:
True
Explanation:
Transgenic animals are lines of animals produced by inserting copies of a specific gene or genes into a fertilized egg or early embryo.
Cancer cells are less likely than normal cells to undergo _apoptosis______, or programmed cell death.
Apoptosis is synonymous to programmed cell death
Explanation:
Programed cells death of the cell is required to maintain proper tissue homeostasis. Examples of when apoptosis is necessary are when a cell may have errors in its DNA replication process. Apoptosis ensures the cell does not continue dividing and generating cells with the error. Other forms of damage to a cell that is hard to repair also require that the cell undergo apoptosis.
In cancer cells, apoptosis pathway faulted and even when cells are required to undergo programmed cell death, such as in the case when lethal mutations occur, the cell continues to divide creating many cells that have the defect. This is what creates cancer tumors,
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Answer:
The annual average CO2 concentration for 2021 could be around 416.3ppm, according to Meteorological Office estimates. An annual rise of about 2.5 ppm is possible, which can potentially make 2021 the first year with the annual average CO2 at 50 per cent above pre-industrial levels, the estimates noted
Answer:
Option (1), (3) and (5).
Explanation:
Positive feedback mechanism also exist in the environment that increases the causative effect of the environment. The environment can change the temperature, precipitation and other climatic conditions of the area.
The lack of moisture in Sahara desert and deforestation can cause the trees extinction. The temperature can be increased by the green house gases as the warm atmosphere causes evaporation. The snow gets melted due to increase in temperature and the ground becomes more darker.
Thus, the correct answer is option (1), (3) and (5).
