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hammer [34]
3 years ago
15

Which mechanism decreases the number of genetic variations in a population? A. founder's effect B. mutation C. gene flow

Biology
1 answer:
Georgia [21]3 years ago
3 0
<span>The correct option is A. Founder's effect is the reduced genetic variability that occur as a result of population production from a small number of colonizing parents. The founder's effects is one of the ways by which nature can randomly produce new species from existing population.</span>
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Molecule 1 has the nitrogenous base sequence TCA AGT. Which set of bases in Molecule 2 can bond to that sequence in a complement
serious [3.7K]

Complete question:

Molecule 1 has the nitrogenous base sequence TCA AGT. Which set of bases in Molecule 2 can bond to that sequence in a complementary way?

a. UCAAGU

B. AGTACA

C. AGUUCA

D. UCAATA

Answer:

C. AGUUCA

Explanation:

DNA template strand and the corresponding RNA have complementary sequences. Adenine in the DNA template strand pairs with "uracil" base of RNA while cytosine pairs with its "guanine" base. Similarly, thymine base in DNA template strand pairs with "adenine" base in the RNA. This occurs since RNA does not have a thymine base. RNA has uracil base instead. Therefore, the molecule 1 with sequence  TCA AGT would bind to the molecule 2 with the " AGU UCA" sequence.  

Molecule 1: DNA template:  TCA AGT  

Molecule 2: mRNA:              AGUUCA

7 0
3 years ago
One of the most important scientific discoveries was penicillin. Research the discovery of penicillin, what produces this drug,
artcher [175]

Answer:

It is essentially a broth culture filtrate of the penicillium mould.

Explanation:

  • Alexander Fleming invented penicillin an antibiotic in 1928. These have been rated as the most important scientific discovery, being among the first antibiotics to be effective against bacterial infection.
  • Penicillin belongs to different families that are selective against a large variety of bacteria.
  • In fact, this antibiotic was discovered by fleming and accident in which he left a platter containing staphylococci open and was contaminated by green mould. There was an area of inhibited bacterial growth around the mould from which he inferred that the mould produced a material that inhibited bacterial growth. This was found to be a penicillium mould through further study.
  • I assume penicillin is the most significant discovery so far because it was the first antibiotic ever discovered against bacterial infection in the absence of any drug.

4 0
3 years ago
A pregnant woman at 22 weeks' gestation is diagnosed with gonorrhea. the health care provider (hcp) prescribes doxycycline. what
Svetradugi [14.3K]
<span>There are two ways of taking Doxycycline, directly ingesting the capsule or by opening the capsule and administering with applesauce. Due to its ability to cause abrasion in the esophagus, it should be taken with at least eight ounces of fluid. With the applesauce, it is important that the nurse measures the contents and ensure that the patient drinks the full glass of fluids.</span>
3 0
3 years ago
Read 2 more answers
Which of four factors that affect evolution apply to the finches that the Grants studied?
harkovskaia [24]

Answer:

The Grants have focused their research on the medium ground finch, Geospiza fortis, on the small island of Daphne Major. Daphne Major serves as an ideal site for research because the finches have few predators or competitors. (The only other finch on the island is the cactus finch.) The major factor influencing survival of the medium ground finch is the weather, and thus the availability of food. The medium ground finch has a stubby beak and eats mostly seeds. Medium ground finches are variable in size and shape, which makes them a good subject for a study of evolution.

Explanation:

5 0
3 years ago
How should we keep track of the amount of carbon trees can store?
77julia77 [94]

Answer:

Use the conversion table to convert the circumference of the tree into the dry weight. Half of the dry weight of the tree is carbon, therefore you need to divide the answer for the dry weight by two. This tells you how much carbon is stored in the tree.

Explanation:

6 0
3 years ago
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