The discovery of cells is most directly linked to the development of the microscope. This tool allowed early scientists to observe these tiny structures for the first time.
The discovery of cells is most directly linked to the development of the microscope. In the 17th century, Robert Hooke and Antonin Van Leeuwenhoek were among the first individuals to observe cells, made possible by the invention and significant improvements of optical microscopy during this era. Cells could not have been observed without this tool, as they are typically far too small to be seen by the unaided eye, cementing the major role that the development of the microscope played in discovering cells.
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Answer:
c. possess a nucleus.
Explanation:
A eukaryotic cell may be unicellular or multicellular. Each cell possesses a well-defined or definite nucleus. Beside nucleus, each eukaryotic cell also has membrane-bound organelles such as mitochondria, chloroplasts, Golgi apparatus, endoplasmic reticulum. Ribosomes, a cell membrane, cytoplasm and DNA are present in all the prokaryotic and eukaryotic cells.
Ans. Microbial cells.
In humans, various symbiotic microorganism live in digestive tracts and are known as gut flora or gut microbiota, such as various bacteria and fungi.
These microorganisms provide immunity against some pathogenic microbes and help in digestion of some indigestible food compounds.
Examples of these microbial cells include Lactobacillus and E. coli.
Thus, the cells described here are 'cells of microorganisms' or 'microbial cells.'
O Unlike the water in lakes and ponds, the water in rivers and streams flows.
O Fish can live in rivers and streams, whereas plants grow in lakes and ponds.
O Lakes and ponds form only after heavy rains, whereas rivers and streams always exist.
Second one.
"Unlike the water in lakes and ponds, the water in rivers and streams flows."
A.) ectoderm
B.) endoderm
C.) mesoderm
the answer is A and B