Answer:
Motile cilia and flagella
Explanation:
Both motile cilia and flagella consist of a central bundle of microtubule that is known as axoneme. The axoneme consists of nine doublets microtubules that surround a pair of the central single microtubules. This arrangement of microtubules in the cross secretion of flagella and motile cilia is called 9+2 arrangement.
Each of the 9 doublet microtubules consists of A and B tubules. Additional accessory proteins are associated with the 9+2 microtubules to make then stiff and elastic.
Answer: This statement ("antibiotics kill bacteria so they must kill healthy human cells too and they must be avoided at all costs!") is wrong and can be proven to be so in the following explanation about the mode of actions of antibiotics.
Explanation:
Antibiotics are drugs which are used for the treatment of diseases caused by bacteria microorganisms. According to their mode of action, they can either be bactericidal or bacteriostatic.
Bacteriostatic antibiotics work by binding to enzymes needed by bacteria to build proteins essential for their own growth and reproduction. Atypical example is the antibiotics, sulfonamide. This drug acts by inhibiting a critical enzyme called dihydropteroate synthase which are specific to the metabolic pathway of the bacteria cells for the synthesis of folic acid. This causes the bacteria to stop growing. Together with the actions of the immune system, the bacteriostatic actions of the antibiotics can effectively stop am infection without affecting the host cells.
Multicellular is the term used to describe the fact that cells are suited to perform a particular function within an organism
Answer:
Population density just represents the average number of individuals per unit of area or volume.
Population distribution describes how the individuals are distributed, or spread throughout their habitat.
Explanation:
