cubit for measuring length
Kilopound used in structural engineering.
length was measured using yard of three feet.
Answer: unlike modern-day evolutionary geneticists, Darwin did not have the knowledge of modern-day genetics or the ability to sequence the genome. So, Darwin couldn’t have determined that the trait of flightless wings was likely caused by a genetic mutation.
Explanation:
Answer:
Pink
Explanation:
A microbiologist named Christian Gram invented the gram staining technique, which aims at using a colored substance (crystal violet in colour) called GRAM STAIN to identify bacteria cells. Using the gram staining procedure, bacteria cells are classified as either Gram-positive or Gram-negative.
Gram positive bacteria are those bacteria types that retain the crystal violet color of the gram stain due to the peptidoglycan content (high) of their cell wall. Hence, they appear PURPLE after the procedure. They don't get decolorized after the procedure.
On the other hand, Gram-negative bacteria does not retain the crystal violet color of the Gran stain (gets washed off) because they lack a peptidoglycan-containing cell wall. During the gram staining procedure, the gram-negative bacteria gets bleached using an alcohol, hence, is recolorized by another dye called SAFRANIN, which makes the gram-negative bacteria appear PINK.
Answer:
sulfonamides inhibit the synthesis of folic acid in bacterial cells. Humans obtain it from their diet.
Explanation:
Sulfonamides are the sulfa drugs and serve as a competitive inhibitors of p -aminobenzoate (PABA). PABA is one of the substances involved in the synthesis of folic acid. sulfonamides compete with PABA for the enzyme of folic acid synthesis and thereby, block the pathways. In the absence of folic acid, bacterial growth is inhibited. Human cells can not synthesize folic acid but obtain it from the food they eat. Therefore, sulfonamides do not affect humans.