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allochka39001 [22]
2 years ago
11

Most polyploid plants arise as a result of _____.a. Self-fertilizationb. A mutation of gamete formationc. Meiosisd. Mitosise. Hy

bridization
Biology
1 answer:
andrew-mc [135]2 years ago
3 0
Hybridization most polypoid plants are the results of the hybridization of two different parental species.

Hope that helped :)

-astroworld301
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A farmer notices that the corn in her fields is growing slowly. So she adds twice the normal amount of fertilizer to each field.
Vikentia [17]
<h2>The correct answer is: Eutrophication.</h2>

Explanation:

  • Fertilizers are inorganic o organic nutrients highly rich in elements like nitrogen, potassium and phosphorus which are essential for the growth of plants.
  • The application of excess fertilizers in the soil causes the surface run off as well as leaching of these nutrients into the soil from where it is gradually transferred into the nearby water bodies, in this case the lake adjacent to the farmer's property.
  • In the lake, these nutrients promotes the growth of plants like algae.
  • The excessive growth of algae in the lake disturbs he ecological balance of the lake and causes a dearth of oxygen in it. This phenomenon is said to be called Eutrophication.
  • The reduction in the level of oxygen in the lake causes the animals, like fishes, in it to gradually die.
4 0
3 years ago
What molecule is created when 4 hydrogen atoms bind with oxygen and 4 electrons
34kurt

i say ho8 or something like that

4 0
3 years ago
In which region of the Sun does energy move through circulating currents of gases? photosphere corona core radiative zone chromo
Tresset [83]
Convective zone is the answer. If you need an explanation just ask.
Hope this helps :)
5 0
2 years ago
Read 2 more answers
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deff fn [24]

Answer: i would say b!

Explanation:

hope i helped! :D

8 0
2 years ago
What is an example of a density dependent factor
enyata [817]

Answer:

In nature, limiting factors affecting population sizes include how much food and/or shelter is available, as well as other density-dependent factors. Density-dependent factors are not relevant to populations that are below "carrying capacity," (i.e., how much life a habitat can support) but they start to have to become noticeable as populations reach and exceed that limit. The degree of control imposed by a density-dependent factor correlates to population size such that the effect of the limitation will be more pronounced as population increases. Density-dependent factors include competition, predation, parasitism and disease.

Competition

Habitats are limited by space and resource availability, and can only support up to a certain number of organisms before reaching their carrying capacity. Once a population exceeds that capacity, organisms must struggle against one another to obtain scarce resources. Competition in natural populations can take many forms. Animal communities compete for food and water sources whereas plant communities compete for soil nutrients and access to sunlight. Animals also vie for space in which to nest, roost, hibernate, or raise young, as well as for mating rights.

Predation

Many populations are limited by predation; predator and prey populations tend to cycle together, with the predator population lagging somewhat behind the prey population. The classic examples of this are the hare and the lynx: as the hare population increases, the lynx has more to eat and so the lynx population can increase. The increased lynx population results in more predatory pressure on the hare population, which then declines. The drop in food availability in turn causes a drop in the predator population. Thus, both of these populations are influenced by predation as a density-dependent factor.

Parasitism

When organisms are densely populated, they can easily transmit internal and external parasites to one another through contact with skin and bodily fluids. Parasites thrive in densely packed host populations, but if the parasite is too virulent then it will begin to decimate the host population. A decline in the host population will in turn reduce the parasite population because greater distance between host organisms will make transmission by more difficult.

Disease

Disease is spread quickly through densely packed populations due to how close organisms are to one another. Populations that rarely come into contact with one another are less likely to share bacteria, viruses and fungi. Much like the host-parasite relationship, it is beneficial to the disease not to kill off its host population because that makes it more difficult to for the disease to survive.

7 0
2 years ago
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