1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
allsm [11]
3 years ago
6

Penicillin (an antibiotic that kills some bacteria) came into widespread use in the 1940s. by the 1990s, several different speci

es of bacteria were already resistant to the effects of penicillin, and it can no longer be used to treat certain diseases. what is the most likely explanation for this?
Biology
1 answer:
KiRa [710]3 years ago
7 0
Just like the adaptation of humans and animals to the environment, the same also applies for bacteria and viruses. 
After so many years of Penicillin being used as the main anti-bacterial cure, bacteria formed resistance due to constant environmental presence.
You might be interested in
Applications and Case Studies of the Next-Generation Sequencing Technologies in Food, Nutrition and Agriculture
UNO [17]
  • Millions of short sequence reads can be generated using next-generation sequencing technology in a high-throughput, economical manner.
  • These new technologies have not only made genome sequencing easier but have also begun to alter the field of life sciences.
  • some of their most important uses includes protein-nucleic acid interaction assays, single nucleotide polymorphism (SNP) and structural variation discovery, whole-genome sequencing and resequencing, mRNA and noncoding RNA profiling, and single nucleotide polymorphism (SNP) and structural variation discovery.
  • These case studies in metagenomics, epigenomics, structural, functional, and comparative genomics are painting a fuller picture of the structures and functions of the genome.
  • These next-generation sequencing technologies will soon have a significant impact on a variety of fields, including agriculture, food, and nutrition.

To learn more about next generation sequencing visit:

brainly.com/question/22273327

#SPJ4

6 0
2 years ago
I need help with these
snow_tiger [21]

Answer No 1:

The trait which is being studied in the cross is the height of the pea plant.

Answer No 2:

The two alleles for this trait are tall height allele which we can write as T and the allele for short height which we can write as t.

Answer No 3:

The allele for tall height is the dominant allele. We can say this because when a cross between a dominant homozyous and a recessive plant were made the offsprings resulted in the tall plants which is the F1 generation in the figure. As a dominant trait masks the recessive trait, hence we can say that the tall height allele is dominant over the short height allele.

Answer No 4:

The allele for short height t is recessive because as we can see the short height trait is being masked by the tall height trait in the F1 progeny. In F2 progeny, there are more number of tall height plants produced which further prove that short height is the recessive trait.

Answer No 5:

The F1 offsprings will have a dominant tall height allele, T, and a recessive short height allele, t. The dominant allele was inherited from the tall parent and the short height allele, t, was inherited from the recessive parent.

We can say that because the F2 progeny shows some plants to have short heights which is only possible if the F1 generation has heterozygous dominant (Tt) alleles.

5 0
4 years ago
Which system controls the Endocrine System?
Paha777 [63]
I’m gonna guess digestive or nervous
3 0
4 years ago
Read 2 more answers
During sexual reproduction if the cell divides three times, how many "new" cells do you have?
expeople1 [14]

Answer:

4

Explanation:

If one cell divides three times there will be three new cells, divides two times there will be three cells, divides one time there will be two cells so the answer is 4

8 0
3 years ago
Read 2 more answers
Genetic screening involves
sattari [20]
Doctors, smart People, and people analyzing genetics
7 0
4 years ago
Other questions:
  • 2 situations that the cell might use exocytosis?
    6·1 answer
  • Why do the fields in Kansas have a circular pattern?
    11·1 answer
  • Is evolution a random process?
    5·2 answers
  • According to the density profile shown here, at which depth would you find the coolest, saltiest waters?
    9·2 answers
  • Every time a monkey is fed, a buzzer sounds. The monkey will probably. OA. think it will be fed when it hears a buzzer O B. beco
    9·1 answer
  • Which list is the theorized correct order of living cells, starting with the first
    11·1 answer
  • Compare a sled’s potential energy at 10 m to its potential energy at 20 m. How does doubling height affect potential energy?
    11·1 answer
  • One of the drawbacks of the place theory is that it fails to adequately explain pitch perception of __________ frequency sounds.
    6·1 answer
  • Which one is the odd one out in these sets fern, conifer and moss​
    10·2 answers
  • placentals and marsupials are two groups of mammals. placentals are more closely related to each other than they are to any othe
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!