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
sammy [17]
3 years ago
5

in the early days of antibiotic use , penicillin and sulfonamide were used to successfully treat a variety of bacterial infectio

ns . in later years stronger antibiotics were needed because some bacteria were either resistant to or not affected by these same antibiotics . this situation is best explained ?
Biology
1 answer:
Vladimir [108]3 years ago
8 0
This situation is best explained by the process of natural selection.
You might be interested in
Another layer of connective tissue, called the ____________ , extends inward from the epimysium and separates the muscle tissue
Lisa [10]
The layer of connective tissue, called the _perimysium_ , extends inward from the epimysium and separates the muscle tissue into small sections. these sections contain bundles of skeletal muscle fibers called _fascicles_ .
Additionally, bundles of contractile proteins called fibrils fill a muscle cell, called a fiber. Outside of each fiber, is the connective tissue endomysium. Bundles of fibers form fascicles, surrounded by perimysium. Bundles of fascicles and perimysium comprise the entire muscle organ, which is enclosed by epimysium.
3 0
3 years ago
*will mark brainliest* Based on the structure, which material will dissolve this biomolecule the BEST?
dimaraw [331]
I think it would be Ionic Solution
5 0
3 years ago
14. What is the carbon cycle?
77julia77 [94]

Answer:

Carbon Cycle: the series of processes by which carbon compounds are interconverted in the environment, involving the incorporation of carbon dioxide into living tissue by photosynthesis and its return to the atmosphere through respiration, the decay of dead organisms, and the burning of fossil fuels.

Explanation:

8 0
3 years ago
Read 2 more answers
Rna primers must be present on which strand during dna synthesis?
Tanya [424]

Answer:Both on the leading strand and on each okazaki fragments of the lagging strand.

Explanation:

A primer is a short single-stranded RNA nucleotide that initiate DNA synthesis at the replication fork. Because DNA polymerase can not initiate replication on it own short strand of RNA primer synthesized by an enzyme RNA primase is needed to initiate DNA polynucleotide synthesis.

RNA primer is present on both leading and lagging strand.

RNA primer of about 10 nucleotides long are present on the leading strand and on each okazaki fragments on the lagging strand to initiate replication. The RNA primer is removed and replaced by DNA nucleotides by DNA polymerase.

6 0
3 years ago
Which substance is used in a sewage treatment system to kill harmful bacteria
slava [35]
The answer to that is, Chlorine
4 0
3 years ago
Other questions:
  • The _____ is sometimes referred to as the "master gland" because almost all of its hormones direct the activity of target glands
    8·2 answers
  • PLEASE help!!
    15·2 answers
  • Consider the food chain grass → grasshopper → mouse → snake → hawk. How much of the chemical energy fixed by photosynthesis of t
    9·2 answers
  • Water plays a key role in chemical weathering by ________.
    14·2 answers
  • Which type of muscle is used primarily for voluntary actions?
    10·1 answer
  • You are observing different tissue samples and classifying the cells into their respective stage in the cell cycle. What can you
    5·2 answers
  • How can you tell if an atom has a negative charge? What type of Ion is this?
    5·2 answers
  • Help please!!! don’t mind the answer that’s filled in already i don’t know the answer
    10·1 answer
  • Which part of the brain processes sensory information from all over your body?
    10·1 answer
  • Tay-sachs disease is caused by a mutation in the hexa gene located on chromosome 15. tay-sachs follows an autosomal recessive pa
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!