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timofeeve [1]
3 years ago
14

Which of the following is an example of primary succession?

Biology
1 answer:
kiruha [24]3 years ago
4 0

Answer:

B. the appearance of lichens and mosses in an area where a glacier has recently melted away

Explanation:

Ecological succession, which refers to the series of changes that occurs over time in an ecosystem, can be of two types namely: primary succession and secondary succession.

Primary succession is a succession that involves an area where no form of life has grown previously, hence, the area of land is barren e.g bare rock. Primary succession is first colonized by species called PIONEER SPECIES e.g. lichens, mosses etc.

According to this question, "the appearance of lichens and mosses (pioneer species) in an area where a glacier has recently melted away" is an example of PRIMARY SUCCESSION.

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A cousin who has been traveling overseas sneaks a plant through customs (who help along with the USDA, help to prevent invasive
Reil [10]

Answer and Explanation:

Invasive species are not native to an ecosystem/environment to which they've been introduced, which can cause disastrous disruptions to various food chains/webs and other native species' populations.

In this case, your cousin is bringing in a plant from overseas, so it clearly will be an invasive plant. You can tell them the following:

- this plant may take over the feeding source of native plants, causing those populations to decrease drastically or possibly even be wiped out

- secondary consumers that had once relied on those native plants for food energy will now have limited resources, competition will increase, and these consumers may begin to die off

- tertiary consumers that consumed these secondary consumers will begin to die off, as well

- this chain reaction will ripple through the entire food chain and food web, and totally disrupt the existing ecosystem

Thus, your cousin shouldn't plant this organism in their backyard and should instead destroy it.

6 0
3 years ago
Matching the following terms and definitions.
Rudik [331]

Answer:

1. Adaptive radiation: A pattern of evolution in which slightly different species evolve from one common ancestor.

2.  Coevolution: A  pattern of evolution in which two species evolve in relation to each other.

3. Convergent evolution:  A pattern of evolution in which similar characteristics evolve between two unrelated species.

4. Divergent evolution: A pattern of evolution in which very different species evolve from one common ancestor.

5. Gradualism:  A theory of evolution that states that a species evolves by consistent, small, steps.

6. Punctuated equilibrium: A theory of evolution that states that a species evolves in spurts of rapid change and then no change.


8 0
3 years ago
Read 2 more answers
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Answer:

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8 0
2 years ago
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Which of the following part of the specific immune response but not the nonspecific immune response?
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Answer:

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Explanation:

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4 0
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What would be the effect of a mutation in the coding region of the lactase gene?
Fynjy0 [20]

Lactase refers to an enzyme that can dissociate lactose sugar into glucose and galactose. This enzyme plays an important role in the digestion of milk that comprises high lactose sugar. In case, if a mutation occurs in the gene codon of lactase, then two possibilities can take place. These are as follows:  

1. Loss of mutation: In this case, the person becomes lactose intolerant because of mutation in lactase gene codon. Due to this, there is low mRNA expression and thus low production of the enzyme lactase. This is also known as lactase non-persistent phenotype.  

2. Gain in mutation: In this case, the person gain an increase in mRNA expression of the lactase gene, thus more production of lactase takes place than usual. This kind of individual exhibits lactase persistent phenotype.  


5 0
3 years ago
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