After development of Robert Hooke's light microscope, early elements of the cell theory were proposed. The invention of light microscope made it easy to study the structure of microscopic cell. After deciphering the cell structure with the help of a light microscope the cell theory was proposed. The invention of microscope was a big break through in the scientific world as it enabled researchers to study the microscopic structure. Later, the microscopes were modified to study the cellular organelles and prokaryotic microorganisms.
Cell theory provides the foundation for the study related to cells such as molecular biology, cell biology, etc.
Answer:
The most important hormone involved in controlling sperm production is a steroid called testosterone. This is produced in the testis itself, by the Leydig cells (see Figure 12a). The testosterone is released from the Leydig cells between the tubules, and taken up by the neighbouring Sertoli cells.
Answer:
In the given statement, per consumption of capita land is not given. Therefore, let's assume that per capita consumption of land is "A". In this case, the landmass needed to be cleared to meet the growing population need can be calculated as follows:
7% of 4790 is 353.3 individuals.
Therefore, to calculate the required landmass, we have to multiply per capita consumption of land with the number of individuals. Thus, "353.5 ✕ A" will be the total land required after 5 years, in addition to what they currently have.
the answer is carbon dioxide
Answer:
A chemical property is a characteristic of a particular substance that can be observed in a chemical reaction. Some major chemical properties include flammability, toxicity, heat of combustion, pH value, rate of radioactive decay, and chemical stability.
AND
Chemical properties can only be established by changing a substance's chemical identity, and are different from physical properties, which can be observed by viewing or touching a sample. The internal qualities of a substance must be altered to determine its chemical properties.
