<span>contractile vacuole
Contractile vacuoles are organelles that are responsible for excretion function. They perform osmoregulation which manages wastes, water and other needed materials in the cell. They are found in some prokaryoric organisms like the algae, protists, amoeba and other unicellular organisms.
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When an athlete eats more protein or amino acids than he or she needs, the extra amino acids are either used in building the muscle tissues or are used in energy expenditure.
Proteins are the macromolecules composed of amino acid as polymers. Protein is an essential food component because it helps in the synthesis and repair of body parts, it help in growth and development, and also provides fuel to the body.
Muscle tissues are the ones responsible for the movement of the complete body. The tissues are rich in blood supply. They are of three categories: skeletal, cardiac and smooth. Any movement in body is possible only because of the contractions and relaxations of muscles.
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Answer:
asexual reproduction
Explanation:
because every single organism in the species is the exact same genetically, there is no variation between them.
Answer:
tetracycline
Explanation:
When the DNA insert is ligated in Pstl site, the ampicillin gene is disrupted while <em>tetracycline gene is still intact</em>.
- If the bacterial colony is growth in a medium with only ampicillin, only the cells that contains the plasmid with the insert will grow.
- If the bacterial colony is growth in a medium with only tetracycline, the cells which have incorporated the plasmid will survive. We cannot distinguish between cells with plasmid + insert and plasmid alone.
- If the bacterial colony is growth in a plate with ampicillin + tetracyclin, only the cells with the plasmid without the insert will grow.
Therefore, to ensure that the cells of a bacterial colony contains the plasmid, they have to be seeded in a plate with tetracycline.
