A microbiologist studies microscopic lifeforms such as bacteria in order to learn more about their structure and function.
(a) Name the type of ribosome found in bacteria.
(1)
(b) Explain how the ultrastructure of a bacterium capsule prevents dehydration
(2)
A microbiologist measures an electron micrograph image of a bacterium to be 4.5 cm
in length.
The magnification used to view the bacterium was 22 500x.
(c) Calculate the actual size of the bacterium.
(3)
Show your working.

After reading the paragraph below, answer the questions that follow. researchers have created a robot that has a very thin leg that is moved by cardiac (heart) cells contracting in unison. the robot, made of a polymer similar to that used in making contact lenses, is bathed in heart cells with supporting cells, which then attach to the robot and provide movement as they contract. all of the cardiac cells working together can cause the robot leg to move in a way that individual cells could not. this is an example of a. emergent properties of cells. b. energy flow through an ecosystem. c. adaptation. d. internal environment regulation.

The mammal pictured below is a silvery mole rat. which statement is an inference based on the picture? the animal is ugly. the animal has hairless feet with sharp claws. the animal has prominent upper and lower incisor teeth. the animal likely has poor vision since its eyes are so small.

Where does oogenesis take place ? seminiferous tubules fallopian tubes ovaries uterus