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natali 33 [55]
3 years ago
9

The major difference between oxygen and ozone is:

Biology
2 answers:
ryzh [129]3 years ago
8 0
The answer is the first one.
Ozone has 3 oxygen atoms whilst oxygen is made from 2 oxygen atoms
AfilCa [17]3 years ago
4 0
Answer is number 1
Oxygen O2
Ozone O3
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Describe the concept of natural selection, using the Galapagos finches as an example. Imagine you were trying to explain the con
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Answer and Explanation:

Natural selection is the result of the phenotype-environment interaction which determines gene destiny in space and time, selecting beneficial alleles and increasing their frequency in the population. It is a consequence of the individual differential capability to reproduce and leave offspring. There must be also a genetic base called heritability. Natural selection involves interactions between individuals, the physical environment, and the biological environment.  

Natural selection results in adaptation, an increase of the aptitude phenotype.  In many cases, adaptations, resulting from natural selection, can be correlated to environmental factors or selective pressures applied by other organisms.

The selective agent is the environmental characteristic that determines the differential survival of the phenotypic classes.  

Some intraspecific phenotype variations follow a geographical distribution and can be correlated to changes in environmental conditions, such as temperature or humidity.  

Adaptive evolution refers to changes in the organism that lead to the evolution of the species and that are adaptive to certain conditions of the environment. Birds adapt to diverse ecological niches showing specialized beak forms to improve functions such as feeding, mating, defending, competing, and etcetera. These factors play an important role in beak shaping. Natural selection produces adaptive evolution.

During 1977 Daphne Major island went through an important drought, and many plant species produced few or no seeds during and after the event. The medium ground finch population, which is seed-feeder species, was hardly affected by this phenomenon. As seeds´ production dropped and the sizes of the extisting seeds were considerably smaller, the finch population declined drastically from about 1400 individuals to a few hundred in a period of two years, approximately. The fact is that the island weather controls plant species development, and thus, seeds availability as food for the birds. Years later after the drought, the finches population managed to recover but showing differences in the size of their beaks. Before the drought finches had a stubby beak and many years after recovering the average size of the beaks was larger than the beak size of the original population.  This difference in phenotype was due to the fact that during the drought, small seeds were very scarce, but large seeds with thick husks were still available. Small birds with small beaks starved because they were not able to open the husk and eat the interior of the seed. But those birds with bigger and stronger beaks were able to do so, and hence, managed to survive. The bird population adapted to the new environmental conditions and resource availability. Natural selection acted on the beak size, changing it.  

There are different kinds of natural selection, but in the present example, directional selection is operating.  

<u>Directional selection</u> increases the proportion of individuals with an extreme phenotypic trait, in this case, large beaks. This selection presents more frequently in those cases in which interactions between living organisms and the environment modify in the same direction.

Furthermore, beak size is not only related to feeding strategies, but also to reproduction. Female finches only mate with males that have the same beak size.

4 0
3 years ago
Some neurons enable you to grasp objects by relaying outgoing messages to the muscles in your arms and hands. these neurons are
densk [106]
The correct answer is known as a "motor neuron".

A motor neuron or also known as a motoneuron is described as <span> a neuron whose </span>cell body<span> is </span>placed inside the<span> motor cortex, brainstem or the spinal </span>cord<span>, and whose axon </span>initiatives<span> to the spinal cord </span><span>or </span>the exterior<span> of the spinal </span>cord<span> to </span>immediately<span> or </span>not directly manage<span> effector organs, </span>specifically muscle mass<span> and glands. </span>
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Plant hormonal regulation differs from animal hormonal regulation in that
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Answer:

Plant hormonal regulation differs from animal hormonal regulation in that there are no dedicated hormone-producing organs in plants as there are in animals.

Explanation:

<em>Plant hormones control different functions in plants such as growth and development.</em> These hromones are signal molecules that affect gene expression and transcription levels. What diferentiates them from animals is that in plants there are no dedicated hormone producing organs. For example, that plants and insects produce their hormones differently.

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Wegener's theory of continental drift was largely dismissed by the mid-1900s. What new evidence was able to revive this theory,
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Answer:

<u>C. The coastlines of South America and Africa were similar in shape, suggesting that they shared a common tectonic plate.</u>

Explanation:

  • As suggested by the Alfred Wegener, the plates of the South America and the African plants had a similar geologic history and thus shared a common tectonic boundary and hence validate the proof of the superclass and the drifting of the plates at various time zones.  
  • Thus after the 1960s the plate tectonic theory came into the limelight and was heavily recognized to be fit the works of the drifting of the continental landmasses.
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Which best describes the role of a primary consumer in a food web?
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Answer: Herbivore that feeds on producers

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