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ryzh [129]
2 years ago
11

You are a biologist on a trip to an island in the south pacific. while on the island, you are allowed to collect dna samples fro

m a local species of rat that resembles a species seen on a nearby continent. if your dna analysis also indicates the two species are closely related, you might conclude that the evolution of the two separate species was an example of _____ speciation through _____.
Biology
1 answer:
Sever21 [200]2 years ago
5 0
Your answer is allopatric and dispersal.

I hope this helps!
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How does the anaphase stage differ in the two phases of meiosis?
Ronch [10]

The answer is c. Anaphase I separates homologous chromosomes and anaphase II separates sister chromatids into daughter cells.


Meiosis is a cell division which results in the reduction of chromosome number by half (from diploid to haploid) in daughter cells. It consists of meiosis I and meiosis II. 

In anaphase I, the sister chromatids separate from each other to the opposite sides of the cells. In meiosis I there are 46 chromosomes in duplicates which are present as pairs of sister chromatids. When comes to separation, homologous chromosomes separates only, but not sister chromatids. Homologous chromosomes are present only in meiosis I.

 In anaphase II, since the cell is haploid, there are 23 chromosomes in duplicates, which are present as sister chromatids. So, in this phase, sister chromatids are those who separates. 


4 0
2 years ago
Read 2 more answers
In two or more sentences, analyze why internal fertilization is more efficient than external fertilization?
almond37 [142]

Answer:

Although more offsprings are produced by the process of external fertilization but the process of internal fertilization is more efficient as compared to external fertilization. This is because, in external fertilization, it is more difficult for the sperm to find the egg and fertilize it. Even after fertilization, it might be that the zygote gets eaten up by a predator. There are none such risks in internal fertilization. The zygote is protected during the internal fertilization which makes this process more efficient.

5 0
2 years ago
Which is NOT true of eukaryotic cells?
KiRa [710]

Answer:

Option (c).

Explanation:

Eukaryotes may be defined as the organism that contains the well defined nucleus and membrane bound cell organelle. The eukaryotes contains morte cell organelles as compared with prokaryotes.

The ribosomes of eukaryotes are larger than the ribosomes of prokaryotes. The 80'S ribosomes are present in eukaryotes whereas 70'S ribosomes are present in prokaryotes.

Thus, the correct answer is option (c).

3 0
3 years ago
Order the steps of the urine formation process
ELEN [110]

Answer:

Filtration, Reabsorption, Secretion: The Three Steps of Urine Formation. The kidneys filter unwanted substances from the blood and produce urine to excrete them. There are three main steps of urine formation: glomerular filtration, reabsorption, and secretion.

Explanation:

6 0
3 years ago
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As a persons ages his or her bones tend to become brittle. This happens as ______ is lost from bone
GREYUIT [131]

Answer:

D

Explanation: the bones can becomew brittle from not haveing calcium

6 0
3 years ago
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