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mina [271]
3 years ago
7

Even before modern observations provided evidence that supports the Theory of Plate Tectonics, people developed theories that th

e continents were once joined together. Using only maps, they observed that -
a
most of the larger land masses are in the Northern Hemisphere.
b
continents with the most moderate climates were located near the Equator.
c
the shapes of continents appeared to allow them to fit together.
d
the oceans have decreased in size throughout the history of Earth.
Biology
2 answers:
Goryan [66]3 years ago
5 0

Answer:

C the shapes of continents appeared to allow them to fit together

alexdok [17]3 years ago
5 0

Answer:

C

Explanation:

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One major difference between acquired traits and entirely genetic traits is<br> that acquired traits
Margaret [11]

Answer: Acquired traits are skills that you have acquired and genetic traits are what you are born with.

Explanation:  Example:  A mother who can play piano really well might have a son.  Just because she can play piano really well does not mean that her son will be able to.

6 0
2 years ago
In the 1890s, Northern elephant seals were hunted almost to extinction. An unknown population of less than one hundred animals m
Inga [223]

Complete question:

In the 1890s, Northern elephant seals were hunted almost to extinction. An unknown population of less than one hundred animals managed to survive on the tiny island of Guadalupe off of Mexico. The current population of over 100,000 is thought to be derived from that tiny remnant population. Compared to the Southern elephant seals (which did not experience such a bottleneck), the Northern elephant seals likely have -------- (Lower - Higher) genetic diversity and -------- (Lower - Higher) levels of genetic diseases.

Answer:

In the 1890s, Northern elephant seals were hunted almost to extinction. An unknown population of less than one hundred animals managed to survive on the tiny island of Guadalupe off of Mexico. The current population of over 100,000 is thought to be derived from that tiny remnant population. Compared to the Southern elephant seals (which did not experience such a bottleneck), the Northern elephant seals likely have Lower genetic diversity and Higher levels of genetic diseases.

Explanation:

Genetic drift is the random change that occurs in the allelic frequency of a population through generations. The magnitude of this change is inversely related to the size of the original population. These changes produced by genetic drift accumulate in time. Eventually, some alleles get lost, while some others might set. Genetic drift affects a population and reduces its size dramatically due to a disaster or pressure-bottleneck effect- or because of a population split -founder effect-.

In the exposed example, extensive hunting acted as a pressure that reduced the number of Northern elephant seals to fewer than 100. This population experienced one or many generations of small size since these animals were affected by hunting. As the survivors did not have the whole genetic pool of the original population,  the population size might have recovered to a current population size of 1000,000 individuals, but <u>the genetic pool might have not</u>. When the small population increases in size, it will have a genetically different composition from the original one. In these situations, there is a<u> reduced genetic variability</u>, with a possibility of developing a peculiar allelic component. If the survivors in the population carried or developed a mutation, probably this mutation passed from generation to generation. It will involve more individuals each time and<u> increase the probability of developing a genetic disease</u>.

4 0
3 years ago
An adaptation is:
andrezito [222]

Answer:

C

Explanation:

...

.................

3 0
2 years ago
What is the open area where an enzyme attaches called?
arsen [322]

Answer:

The open area where the substrate is attached to an enzyme is called the active site.

Explanation:

The active site of an enzyme corresponds to the place where the tertiary structure of this molecule leaves a free space to couple the substrate and be able to catalyze a chemical reaction.

Since the enzyme-substrate complex functions as a <u>key lock system</u>, the active site has a three-dimensional configuration that only admits certain molecules as substrate, which determines its specificity.

5 0
3 years ago
Which of the following is true about acid rain?
babymother [125]

Answer:

EL HIELO SE EVAPORA

Explanation:

POR EL CLIMA

5 0
2 years ago
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