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
k0ka [10]
3 years ago
14

A paleontologist identified two distinct species of mollusks in the fossil record of a region. In the layer below a mass extinct

ion that devastated the region, the paleontologist observed that shells of species A was present in small numbers over a widespread area whereas species B was abundant and found in a few restricted areas. Which of the following predictions about the fossil record in the layer above the mass extinction is the MOST likely to be supported by further excavations?
a. Species A survived because of its widespread range including some areas that were not as affected by mass extinction.
b. Species A survived because the low number of individuals meant that there was less competition for resources.
c. Species B survived because it was the more abundant and more individuals survived.
d. Species B survived because the population was concentrated in a few areas and had a higher chance of survival.
Biology
1 answer:
zmey [24]3 years ago
7 0

Answer:

a. Species A survived because of its widespread range including some areas that were not as affected by mass extinction.

Explanation:

The species distribution might confer extinction resistance during massive extinction events. One of the most important reasons for a species -or any other taxonomic group- to survive massive extinction is its wide distribution area.

The broad geographical range of a group -as Species A in the example- enhances the survival chances during mass extinctions. When the event occurs, it severely affects most individuals of a certain area. If the species is restricted to that area, then the species will probably disappear, no matter the number of individuals living there.

But if the species is widely distributed, there are more survival chances. The extinction event will only affect a few regions, but not all of them, meaning that some of the individuals of the species will be able to survive.

Probably as only a few individuals of species A got to survive, they must have suffered the effects of genetic drift after the disaster, causing a reduction in genetic variability.

You might be interested in
The cells in the retina (called rods and cones) that convert light energy into nerve energy are called ________.
Sloan [31]

Answer:

The cells in the retina (called rods and cones) that convert light energy into nerve energy are called photo-receptor cells.

Explanation:

6 0
3 years ago
Think of two types of biomes and list them.  Describe how they are similar.  What are the differences between the two types of b
Zarrin [17]

Answer:

Dessert and tundra

Explanation:

Theses two biomes get very little rain and because of this they have a less diversity of fauna and flora.

The differences are that a tundra is very dry and extremely cold and on the other hand a desert is very arid and hot and it can go as high as 54°C (130°F).

7 0
3 years ago
Assume that the mother's genotype is AZ/az, and the father's genotype is Az/aZ, and the recombination rate is 10%. What are the
attashe74 [19]

Answer:

0.45 from mom and 0.05 from dad.

Explanation:

The recombinant progeny might occur due to the crossing over at the time of meiosis in which the exchange of chromosomes occur in the homologous chromosomes of non sister chromatids.

The progeny receives half of their chromosome from the mother and half from the father. The mother 50% AZ and 50% az chromosomes respectively. The 10% recombination has occured due to which the mother chromosomes is reduce upto 45%. The recombinant  10% will be aZ and Az and has 5% frequency. Mom has the ability of az chromosomes is 0.45 %. The father has the genotype 50% Az and 50% aZ. The 10% recombination has occured due to which the father chromosomes is reduce upto 45%. The recombinant will be az and AZ with 5% frequency. So, father has az with 0.05 % probability.

Thus, the answer is 0.45 from mom and 0.05 from dad.

8 0
3 years ago
In a forest, rabbits are the prey to owls. An increase in the number of rabbits in the forest would result in Group of answer ch
hichkok12 [17]
The answer is a because if you have more rabbits more owl would want to eat then
3 0
3 years ago
Read 2 more answers
What is the function of the mitochondria
12345 [234]

They break down sugar molecules to provide energy for the cell.

Good luck! :)

6 0
3 years ago
Other questions:
  • Light can be diffracted or scattered true or false
    5·1 answer
  • Which item in the comparison chart takes the least amount of water to produce? Which takes the greatest? How much water is that?
    9·1 answer
  • Which of the following correctly describes the image below?
    5·1 answer
  • The islands of the hawaiian chain are an excellent example of a series of
    15·1 answer
  • Plz help!!!
    11·1 answer
  • In a short, detailed paragraph, please answer the following.
    14·1 answer
  • Which is the correct order from smallest to LARGEST?
    14·1 answer
  • eukaryotes a. are larger than prokaryotes b. have many different specialized organelles c. contains a nucleus d. all of the abov
    8·1 answer
  • Which of the following diagrams illustrates the position of t3
    5·1 answer
  • In which environment will decomposition occur the fastest?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!