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3 years ago

In 1941, ______ was the first used successfully to treat an infection caused by a bacterium.

1 answer:

6 0

Albert Alexander was the first patient to be successfully treated on an infection caused by bacteria. He accidentally scratched a thorn of a rose on his face which badly infected him. One of his eyes had also been removed. He was given an infusion<span> of 160 mg of penicillin on February 12, 1941, and within 24 hours, his wounds begun to heal. He, however, died on March 1941. </span>

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The words below are monomers of what Carbo Hydrates, Proteins, Lipids, or Nucleic Acids 1- Glucose 2- phosphate 3- Sugar (5 C) 4

Tanzania [10]

Answer:

Explanation:

glucose is the monomer of carbohydrate

phosphate is the monomer of nucleic acid

sugar is the monomer of nucleic acid

amino acid is the monomer of protein

glycerol is the monomer of lipid

nitrogenous base is the monomer of nucleic acid

8 0

3 years ago

Is the following statement true or false? Explain your

Marrrta [24]

Answer:

False.

Explanation:

Cell membrane is made of the lipids and proteins with the attached moieties of carbohydrates. The plasma membrane is the selectively permeable membrane that allows the diffusion of some selected particles only.

The transport along the cell membrane depends on the size and the hydrophobicity of the molecule. The size of oxygen is although higher than magnesium but to its highly hydrophobic nature it can easily pass through the plasma membrane as compared with the magnesium. The oxygen diffuses out faster than magnesium.

Thus, the answer is false.

8 0

2 years ago

Consider the equation S + O2 ? SO2. What is the product? Question 3 options: S SO 2 S + SO 2 O 2

Keith_Richards [23]

Answer : The product in the given balanced reaction is, sulfur dioxide $(SO_2)$ .

Explanation :

The balanced chemical reaction will be,

$S+O_2\rightarrow SO_2$

This reaction occurs when sulfur react with oxygen gas to give sulfur dioxide gas as a product.

In the given balanced chemical reaction, sulfur (S) and oxygen gas $(O_2)$ are the reactants and sulfur dioxide $(SO_2)$ is the product.

Hence, the product in the given balanced reaction is, sulfur dioxide $(SO_2)$ .

8 0

2 years ago

In cod fishing, older and larger fish are more likely to be retained in nets than younger and smaller fish. Despite the removal

AlexFokin [52]

Answer:

D. Selection has led to decreases in the size of fish at the age of reproductive maturity.

Explanation:

The larger body size of the fishes is not an adaptive trait as it reduces the survival chances of these fishes. The process of natural selection tends to increase the frequency of the traits that increase the survival fitness of the organisms. Here, the fishes with smaller body size at the reproductive age have greater chances of survival and would reproduce more to leave more progeny. Over the generations, the selection pressure would increase the proportion of fishes that are smaller during reproductive age.

4 0

2 years ago

Read 2 more answers

Which of the following statements is true?

timofeeve [1]

From te options above, the only true statement is :
Today, most scientists believe that both nature and nurture are important in animal behavior
For example : Imprinting ducks

hope this helps

6 0

2 years ago

Read 2 more answers