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3 years ago

What contribution did Jonas Salk make to science in the 1950s?

Biology

2 answers:

victus00 [196]3 years ago

8 0

He basically made the first safe and effective vaccine for the disease Polio

Sergio039 [100]3 years ago

4 0

Jonas Salk made the Polio vaccine.

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Question 17 of 30

Alex Ar [27]

Answer:

Iron usually forms an

Induced magnet

7 0

2 years ago

Which processes are part of the fast carbon cycle?

agasfer [191]

The key processes in the fast carbon cycle include: Photosynthesis: the absorption of CO2 from the atmosphere (terrestrial plants) and from oceans (marine plants) to produce organic carbon structures. Respiration: the release of CO2 into the atmosphere, soil and oceans by animals as they exhale.

8 0

2 years ago

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Now consider a single base mutation in a codon for leucine that creates a codon for phenylalanine. A true reversion changes the

madam [21]

Answer:

options A, B, D and E

Explanation:

leucine codons include: UUA, UUG, CUU, CUC, CUA, CUG

phenylalanine codons include: UUU, UUC.

CUU

replace C with U to give

UUU phenylalanine codon

replace underlined with A

UUA leucine codon

CUC

replace underlined with U

UUC phenylalanine codon

replace underlined with A or G

UUA, UUG leucine codons

UUG

replace underlined with U

UUU phenylalanine codons

replace underlined with C

CUU leucine codon

UUA

replace underlined with U or C

UUU or UUC phenylalanine codons

replace U with C

CUU or CUC leucine codons

7 0

2 years ago

If a corn plant was heterozygous for kernel color and seed shape, what would be the genotype of the plant?

NNADVOKAT [17]

Answer:

The genotype of the plant will be PpSs and the phenotype will be purple colour and smooth shaped.

Explanation:

Considering the description in the question, we know that purple colour is dominant over the yellow colour and smooth shape is dominant over the wrinkled shape.

A homozygous trait can be described as a trait which arises due to the same alleles of a gene. A heterozygous trait arises when both the alleles of a gene are different. In such a case, one allele will be dominant over the other one and the phenotype of the dominant allele will be seen in the plant. As purple colour and smooth shape are dominant traits, hence they will be seen in the heterozygous plant.

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3 years ago

The boxer bunched his fingers into a fist and hit the bag as hard as he could.

Archy [21]

Yes yes yes yes yes yes yes

4 0

2 years ago

Read 2 more answers