Why do bacteria have ribosomes?
What will be an ideal response?
Bacteria lack a nucleus to house the DNA, but they still have DNA and still need to make proteins. The ribosomes are required for translation of the mRNA into a protein. Bacteria also lack the rough endoplasmic reticulum, but this is only used in eukaryotic cells to synthesize the larger, more complex proteins that are often exported out of the cell for use in other parts of the body. Being a single-celled organism, most bacterial proteins are small and do not need to be exported.
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Antibiotic therapy is not significantly useful for treating typhoid fever
Indicate whether the statement is true or false.
The function of the torus in the walls of tracheids is
A. allowing the passage of water. B. stopping backflow of water. C. secretion of resin. D. sealing off air bubbles. E. allowing the escape of air.
The tropical rainforest trees form shallow roots concentrated near the surface in a mat few centimeters
thick. These swollen bases or braces are called:a. prop roots. b. pneumatophores. c. aerial roots. d. buttress roots. e. velamen roots.
About 95% of all modern plant species
A) have a dominant sporophyte in their life cycle. B) lack a sporophyte to house a gametophyte stage. C) have a gametophyte adapted to house a sporophyte stage. D) have flagellated sperm.