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Alchen [17]
3 years ago
13

The northern elephant seal was hunted almost to extinction during the 18th and 19th centuries. Less than 100 seals were left to

contribute to the gene pool of their future generations. Since the early 20th century, the elephant seals have been protected by law in both the U.S. and Mexico. Over 100,000 seals now inhabit the western shores of North America, all related to the small population that survived the slaughter of hunters.Scientists fear the elephant seals may be more susceptible to disease and pollution due to a ______.A. heterozygous advantageB. disruptive type of selectionC. Founder EffectD. Bottleneck Effect
Biology
1 answer:
Bad White [126]3 years ago
6 0

Answer:

The correct answer is option D, that is, bottleneck effect.

Explanation:

A phenomenon, which occurs due to events like earthquakes, floods, or other natural calamities that result in the severe declination in the size of a particular population is known as the bottleneck effect. The bottleneck effect is an extreme illustration of genetic drift that results in the reduction of a population's genetic variability.  

With the decline in the size of a specific population, a reduction in the genetic variability of the same population is witnessed due to the loss of alleles. This eventually makes the population vulnerable to pollution and diseases. Hence, the given case is an example of the bottleneck effect.  

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How is the genetic graph different from natural selection
andrew-mc [135]

Answer:

Both natural selection and genetic drift are mechanisms for evolution (they both change allele frequencies over time). The key distinction is that in genetic drift allele frequencies change by chance, whereas in natural selection allele frequencies change by differential reproductive success.

6 0
2 years ago
What would you except to happen if you rubbed a mineral of hardness 7.5 against a piece of quartz
ziro4ka [17]

Quartz also has a hardness level of 7.5, so rubbing another mineral with a 7.5 hardness on it will not effect the quartz.

7 0
3 years ago
during the light dependent reaction of photosynthesis ___ is decomposed to supply hydrogen ions to produce nadph and important e
Elena-2011 [213]
The answer to the question mentioned above is the "Chloroplast".
 
During the light-dependent reaction of photosynthesis, chloroplast is decomposed to supply hydrogen ions tp produce NADPH, and important energy-carrying molecule used to help produce glucose during the light dependent reaction.
3 0
3 years ago
Read 2 more answers
Can you answer these 2 questions? plsssssss
Maru [420]

Answer:

Because the Earth rotates on its axis, circulating air is deflected toward the right in the Northern Hemisphere and toward the left in the Southern Hemisphere. This deflection is called the Coriolis effect. Click the image for a larger view. Coastal currents are affected by local winds.

Upwelling is the process that brings deeper water to the surface, and its major significance is that it brings nutrient -rich deep water to the nutrient-deprived surface, stimulating primary production

Explanation:

3 0
2 years ago
In a cross between individuals of a species of tropical fish, all of the male offspring have long tail fins, and none of the fem
Sergio039 [100]

In this cross the trait of long tail fins is associated with the “Y” chromosome of the male.  

Thus the alleles  of the male are represented by XY” where X chromosome has no trait of long tails find  

And the allels of the female are represented by XX, as they do not have long tail fins.  

When these two are crossed , the following punnet square is produced

X     Y”

X X X    X Y”

X X X     X Y”

The XX is the female while the XY” is the male offspring.  

8 0
3 years ago
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