Which cell is the largest?
Ovum Ovum (female gamete) is the largest cell present in the human body. It is a single cell released from the ovary every month.
Which is the smallest cell?
Mycoplasma gallicepticum Mycoplasma gallicepticum is the smallest cell. Mycoplasma’s size is 0.2–0.3 μm. Mycoplasma are the smallest living organisms on the earth.
Who discovered the cell?
Robert Hooke Initially discovered by Robert Hooke in 1665, the cell has a rich and interesting history that has ultimately given way to many of today’s scientific advancements
Who is the father of cell?
George Emil Palade Complete answer: George Emil Palade is considered the father of cell biology. He was the one who first used the electron microscope. With the help of an electron microscope, he discovered the ribosomes and the activity of the secretory…
Who first called biology?
The term biology was first used by famous scientists Lamarck and Treviranus in 1802. The term biology is originated in the Greek language in which Bios means life; logos means discourse
What is famous in biology?
Charles Darwin (1809–1882): theory of evolution Probably the most famous naturalist of all time, Charles Darwin’s contribution to biology and society is immense. He established that all species of life descended over time from common ancestors, with species continuing to exist…
Summary
The Architecture of the Galaxy The Milky Way Galaxy consists of a thin disk containing dust, gas, and young and old stars; a spherical halo containing populations of very old stars, including RR Lyrae variable stars and globular star clusters;…
The Formation of the Galaxy
Learning Objectives By the end of this section, you will be able to: Information about stellar populations holds vital clues to how our Galaxy was built up over time. The flattened disk shape of the Galaxy suggests that it formed…
Stellar Populations in the Galaxy
Learning Objectives By the end of this section, you will be able to: In the first section of this chapter, we described the thin disk, thick disk, and stellar halo. Look back at Table 25.1 and note some of the patterns. Young…
The Center of the Galaxy
Learning Objectives By the end of this section, you will be able to: At the beginning of this chapter, we hinted that the core of our Galaxy contains a large concentration of mass. In fact, we now have evidence that…