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elena-s [515]
3 years ago
15

Lord howe island is a volcanic island in the tasman sea that is about 11 km long and 2.8 km wide. the island has two species of

palm trees, howea forsteriana and the more abundant howea belmoreana. the two species do not interbreed even when they grow very close to each other. which evolutionary process is not occurring in the described scenario?
Biology
2 answers:
Alenkinab [10]3 years ago
7 0

<u>Answer</u>: Hybridization.

Hybridization is the process through which two species can mate with each other and produce fertile offspring thus creating a new species.

This is not happening with the two palm species on the island. This may be due to prezygotic barriers that prevent these two species from mating and producing a zygote (fertilized egg cell). In essence these barriers prevent any gene flow between the two species.

Juliette [100K]3 years ago
7 0

OPTIONS:

A. Genetic drift of Howea forsteriana  B. Natural selection of adaptive traits in both species  C. Gene flow between the two species  D. Mutations in Howea belmoreana

Answer:

C. Gene flow between the two species

Explanation:

One of the important evolutionary processes that drives evolution among species population is gene flow. Gene flow refers to the transfer of genes from one population to another through migration and reproduction, whereby new gene versions from one population are introduced into the other, and vice versa. genetic materials are exchanged between two the two populations thereby causing genetic variation.

Therefore, the inability of howea forsteriana and howea belmoreana to interbreed is most likely caused by lack of gene flow between both species.

Gene flow is the evolutionary process that is not occurring in the described scenario.

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Yuki888 [10]

Answer:

The correct answer is: mutualism

Explanation:

Mutualism refers to a relationship between two organisms, where both organisms benefit from the association. In this instance, the relationship between cellulose-digesting microorganisms and their hosts-  termites and ruminant mammals- is characterized by mutualism because both organism benefit from their association. The microorganisms benefit by getting their nutrition from the cellulose in guts of their hosts. Whereas, the hosts benefit from the cellulose-digesting microorganisms by getting help in digesting the cellulose they consume in their diet.

6 0
3 years ago
Use a Punnett square diagram to show why, for each pregnancy, the chances of giving birth to either a boy or a girl are 50-50. E
ikadub [295]

Answer:

Because the offspring of a male and female are always going to be xx, xx, xy, or xy.

Explanation:

Remember that men have different reproductive chromesomes than women. Women have 2 x chromesomes(xx) while men have 1 x and 1 y(xy). These are given down to their offspring.

So we can write the this out in a punnet square as(link down below).

After you see the visual, you will find that the genotypes are xx, xx, xy, xy.

As I said above, women have sex chromesomes xx, while men have sex chromesomes xy. When you match the genotypes on the punnet square with the ones we know from men and women, we find that two of them match with men and two match with female.

So with this, we can conclude that 2/4 of offspring will always be male and 2 will be female. And as you well know 2/4 is 1/2 which is 50%.

3 0
3 years ago
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podryga [215]

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The Founder effect has its similarities (in terms of the resulting reduced genetic pool) with the bottleneck effect, BUT it occurs when a new colony is started by a few members of the original population.

The Hardy-Weinberg equilibrium is a principle in population genetics that states that the genetic variation in a population will remain constant from one generation to the next IF certain conditions are present (no migration, aleatory mating, among others), so this is not the answer.

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7 0
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