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Sedbober [7]
3 years ago
15

A population of lizards were living in an area that began to experience a great amount of mountain building. As the mountains fo

rmed some lizards were on one side of the mountains and the rest were on the other side of the mountains. Over a period of many years the lizards were no longer able to breed, or had become different species. Why did this happen?
Biology
2 answers:
marishachu [46]3 years ago
8 0

In order to live in certain conditions the lizards had to adapt to the area in order to live. From adapting they are no longer able to breed.

Blababa [14]3 years ago
7 0
They became adapted to their new environment and became new species which then were not able to produce fertile offspring.
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Forests dominated by gymnosperms tend to have mechanisms to allow it to regenerate after a fire. As a consequence this type of f
Snowcat [4.5K]

Answer:

Forests dominated by gymnosperms tend to have mechanisms to allow it to regenerate after a fire. As a consequence this type of forest<u> is dominated by trees of single age .</u>

Explanation:

  • It is possible to conclude the question given above in many ways. After a forest fire in a specific forest patch occurs, the impacts are determined by the severity of the fire and the type of forest in which the occurrence occurs. Usually, the dramatic effect on the trees and plants that can be seen in that region can be seen after such an occurrence has occurred. In certain situations, the situation can also worsen, leading to the destruction of the entire cover, if the circumstances favor the propagation of fires. In such cases, the removal of the prevailing structure can lead to the formation of a new forest structure through a mechanism called 'succession,' in which there is a sequence of progression in a biologically acceptable manner through the growth of different plant species. Simply put, the new plants will attempt to adapt or acclimatize to the conditions introduced after forest fire in such a way that this will later provide the route for the growth of plants and trees that can not easily accommodate in the harsh conditions. Therefore, instead of the forest surviving for a short period of time following a forest fire occurrence, there would be changes in the nature of the forest. <u>This suggests that option 'B' is not the response that is most suitable.</u>
  • Choice 'A' appears to be logically inaccurate, taking into account that if they are of high intensity, fires may be uncontrollable. In addition, there is no clear mention of the fire's region of origin and which trees are most affected. Typically, gymnosperms illustrate a simple process in which they can not limit their destruction from the flames, while they can provide a way for their progeny to initiate next generation development in the form of seed. This occurs in the case of Gymnosperms in which, under ordinary conditions, the seeds of the plants are enclosed within a cone that is restricted from germinating. Although the fires pave the way for the seeds to germinate under certain fire conditions, which in turn leads to the emergence of the next generation of gymnosperms, and several studies indicate that these newly introduced seeds would have the same age as choice 'C' indicated. But, as this is not under the jurisdiction of the US Forest Service, legally, option 'A' tends to be wrong. At the same time, it can be seen that forest fires are not consistent in their coverage in certain cases, and thus the chances of dispersal and germination tend to be not even and thus choice 'C' can be reported to be either correct or incorrect in all possible ways.
  • But, first, it is important to know what an overstory is for the option 'D'. A forest consists of trees of all sizes, from the smallest to the tallest pine trees. The uppermost element that is directly in contact with the light from the sun is the overstory. The manner in which the degree of overstory damage occurs depends on the moisture content of the trees and the other associated conditions around the trees. Taking this into account, a forest fire may either lead to the loss of an entire overstory or can have impacts that are confined to plants and trees at the ground level. So, even the 'D' option can be right or inappropriate. But, therefore, choice 'C' should be the most suitable response, taking into account that most studies indicate growth of single-age trees due to germination mediated in the presence of fire. This seems to be scientifically right for a small patch where there was also fire-mediated damage. Accordingly, the most suitable response should be option 'C'.

<u>Hence , the correct option is C.</u>

6 0
3 years ago
2. Describe Darwin's childhood and early career pursuits.
aksik [14]

The childhood and early career of Charles Robert Darwin is discussed below.

<h3><u>Explanation</u>:</h3>

Charles Robert Darwin was born on 12 February 1809 in Shrewsbury, Shropshire. He was the fifth of six children of wealthy society doctor and financier Robert Darwin and Susannah Darwin. His grandfathers Erasmus Darwin and Josiah Wedgwood were both prominent abolitionists of the recent times.

Darwin started his career as an apprentice doctor, helping his father treat the poor of Shropshire, before he started to go to the University of Edinburgh Medical School. He found the lectures dull there and in his second year at the university he joined the Plinian Society, a student natural-history group. His father then sent him for a Bachelors of Arts degree which also he couldn't peruse.

After a long fight, he went on his famous voyage on HMS Beagle around the world where he collected his data and then gave his hypothesis in his book named '' On the Origin of Species by means of Natural Selection and Preservation of the Favoured Race in the Struggle for Life''

7 0
3 years ago
Read 2 more answers
Normally, in corn, genes for waxy and virescent kernel appearance are in the same chromosome. In a certain stock, however, it wa
meriva

Answer:

Translocation

Explanation:

Changes occur to the nuclear material from time to time. These changes are referred to as MUTATIONS. A mutation is a change in the nucleotide sequence of a gene. Mutations are of different types depending on how it occurs.

According to this question, the kind of mutation/abberation described is TRANSLOCATION. Translocation is a kind of chromosomal abnormality in which one segement of a chromosome containing certain genes breaks off and reattaches to a different chromosome.

This is the case in this question regarding the genetic composition of corns where genes for waxy and virescent kernel appearance occur in the same chromosome. It was found out that, in a stock of corn, these two genes are now on different chromosomes. This means that a segment of the chromosome containing one of the genes broke off and got reattached to a different chromosome. Hence, TRANSLOCATION MUTATION has occurred in this stock of corn.

3 0
3 years ago
PLEASE HELP ASAP!! DUE TODAY!! 15 POINTS FOR BRAINLIEST
olga_2 [115]

1- The following are the examples of mechanisms which help maintain homeostasis:

  • Increase heart rate in response to exercise.
  • Insulin secretion in response to high blood sugar.
  • Antibodies binding to virus.

2- Correct order is as follows:

  • Body temperature exceeds 98.6 degrees F
  • nerve cells send message from skin to the brain
  • temperatures regulation center in the brain sends out signals
  • sweat glands throughout the body activate to cool off skin surface
  • body returned to normal temperature around 98.6 degrees F

3- Low blood sugar would likely a stimulus that would cause the body to initiate feedback mechanisms. Because If blood glucose gets too low, the body releases glucagon, which causes the release of glucose from some of the body’s cells. And this is an example of feedback mechanism.

4 0
3 years ago
Plant cells must absorb energy, release energy and then use energy to do cell work. What two processes do they use to do this?
Ronch [10]

Answer:

Photosynthesis and cell respiration

6 0
3 years ago
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