C. Mutagens causes mutations.
Answer:
Australopithecus afarensis
Explanation:
Lucy was the first Australopithecus afarensis species found. It represents 40% of the skeleton of a female. It was discovered in Africa in 1974, near the village Hadar in Awash valley of Afar triangle, Ethiopia and is dated about 3.2 million years ago. Notable characteristics includes rib cage and plant based diet, cranial specimens, pelvic girdle, ambulation etc.
Answer:
Superbugs are bacteria that are resistant to Antibiotics.Bacteria becomes resistant to antibiotics and carry genes that allow them to survive in harsh conditions. The infection caused by these bacterias are difficult to treat.These antibiotic resistance can be trasmitted from one bacteria to its offspring.
Explanation:
Answer:
1.574
Explanation:
Given that:
Gram of solution = 100 g
Solution = solute + solvent
Solute = 6.75% = (6.75 / 100) * 100 = 6.75 g (Ethanol) (C2H5OH)
Solvent = 100 - 6.75 = 93.25 g
Recall :
Molality = (mol of solute / kg of solvent)
Mole of solute = gram / molar mass
Molar mass of C2H5OH = (12 * 2) + (1 * 5) + 16 + 1 = 46g/mol
Mole = 6.75g / 46g/mol
Mole = 0.1467391
93.25 g to kg
1000 g = 1 kg
93.25 g = 93.25 / 1000 = 0.09325
Hence,
Molality = 0.1467391 / 0.09325
= 1.5736096
= 1.574