Answer 1) A compound light microscope.
Explanation : A compound light microscope is the one which can magnify the objects in steps. It is the optical instrument that uses light and a series of lenses to magnify objects in steps; and can magnify an object up to 1500 times than its original size.
Answer 2) An electron microscope
Explanation : An electron microscope which is able to magnify the smaller details in objects. It is capable of much higher magnifications and has a greater resolving power than a light microscope, allowing it to see much smaller objects in finer detail. hence, it was the type of microscope which was used to observe the first strands of DNA.
Answer 3) A compound light microscope
Explanation : A compound microscope is the instrument which contains a series of lenses. In which each lens has its own function. A lens close to the object which is being viewed to collect light is called as the objective lens and it focuses a real image of the object inside the microscope. Which is then accompanied by other lenses in series.
Answer 4) : A compound light microscope
Explanation : This microscope has many magnifying glasses in it. When the image from the objective lens is formed; then that image is magnified by a second lens or group of lenses which is called the eyepiece and it gives the viewer an enlarged inverted virtual image of the object.
Answer 5) : An electron microscope
Explanation : This microscope is the one which creates a digital image. It is done with the help of accelerated electrons as the source. The image obtained is normally detected by the digital camera and can be displayed on a monitor or computer.
Answer 6) A simple light microscope
Explanation : This is the simplest form of microscope which only uses one lens for magnification. It uses a magnifying lens as the main lens and focuses on the object which can be seen as the image.
b. False
The evolutionary mechanisms might account for the origin and persistence of cell-to-cell signaling in unicellular prokaryote - quorum sensing
It is Phenomena by which the bacteria can detect the specific stimuli and respond towards the cell population density. It helps in coordinating gene expression andis used in prokaryotes for cell to cell signaling and cell communication.
The main evolution of quorum sensing in bacteria was to relay the information and help in cell signaling by releasing specific toxins. These prokaryotic organisms that are capable of quorum sensing would survive more in their environment, adapt well in their environment.
Learn more about quorum sensing:
The origin and persistence of cell-to-cell signaling in unicellular prokaryotes can be attributed to natural selection, where the ability to communicate provided a survival advantage. Such communication, primarily seen within the same species, facilitated processes like mating and nutrient sensing. This function was further essential in the evolution of multicellular life forms.
The evolutionary mechanisms that might account for the origin and persistence of cell-to-cell signaling in unicellular prokaryotes include natural selection and horizontal gene transfer (HGT).
The first life on Earth comprised of simple single-celled prokaryotic organisms with limited interaction capabilities. However, to adapt and survive in different environmental conditions, these organisms developed a mechanism of signaling within the same species. External signaling also occurs between different species but is limited compared to within-species communication.
Yeasts and bacteria, for instance, signal each other to aid in processes such as mating, nutrient sensing, and social behaviours like forming large complexes called biofilms.
The necessity of cellular communication became even more crucial with the evolution of multicellular organisms. Thus, the ability to communicate through chemical signals that originated in single cells was integral to the evolution of multicellular life forms.
Scientific consensus proposes that metabolically interactive prokaryotic communities may have facilitated the emergence of eukaryotic cells. Hence, the efficiency of these communication systems was pivotal for the diversity and functionality of all life forms as we know it.
Answer: 1364
Explanation:
Am Gen Students
1 1 4
2 16
3 64
4 256
5 1024
1364 Total