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garik1379 [7]
1 year ago
10

Thylacosmilus is a marsupial, and Smilodon is a mammal. Thylacosmilus and Smilodon both have saber teeth, but they do not share

an ancestor that had saber teeth. What are saber teeth for these organisms?
A analogous structures
B homologous structures
C vestigial structures
D mutated structures
Biology
2 answers:
Kaylis [27]1 year ago
7 0

analogous structures


Deffense [45]1 year ago
3 0

The right answer is analogous structures.

It is nevertheless interesting to note that several years before, a competition took place rather quickly between two types of mammals: the placentals and the marsupials, the Evolution having given in each of these two groups also armed individuals as we will see it next (We speak then of parallel evolution, that is the acquisition of similar characteristics in two species occupying the same space, not to be confused with a convergent evolution which gives identical attributes to two populations existing at times or in different ecosystems).

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In Zambia, which lions are likely to have migrated from a different population?
Margaret [11]
Zambian lions are split into two subpopulations, with one in the Greater Kafue Ecosystem in the west and the other in the Luangwa Valley Ecosystem in the east. Between these two geographically different regions lies Lusaka, Zambia's largest city, which is surrounded by farmland. males travel long distances to find new prides, while females remain in or close to the pride they were born in. So, for the lion, it's primarily males that are responsible for the movement of genes between prides. This male-mediated gene flow explains the lack of gene flow seen in mitochondrial genes compared to that of nuclear genes—female lions aren't making the journey, but they do mate with new males who come from far away.

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4 0
1 year ago
A chemist measuring the viscosity of oils records the instruments and methodology used, so that another scientist will be able t
MariettaO [177]

Answer:

This is an example of replication.

Explanation:

Getting a similar outcome when a trial is rehashed is called replication. Replication is significant in science so researchers can check their work. The consequence of an examination isn't probably going to be very much acknowledged except if the examination is rehashed ordinarily and a similar outcome is constantly acquired.

Hence, This is an example of replication.

8 0
1 year ago
Which of the following phenomena is a consequence of Independent Assortment? 1. Pure breeding plants, when mated with each other
Natalka [10]

Answer: The answer is that the phenotypic ratio among phenotypes produced from an F1 X F1 dihybrid cross is 9:3:3:1.

Explanation:

Independent assortment of genes explains how alleles on different chromosomes arrange independently of one another during gamete formation.

So, a dihybrid cross involving TWO characters (e.g Seed color & seed shape) would have its respective alleles DISTRIBUTED whether dominant or recessive, for crossing to occur and yield varying proportion of offspring in the well spread ratio of 9:3:3:1; making it a consequence of independent assortment of genes

7 0
1 year ago
Which of the proposed models for the mechanism of initial transcription suggests that the entire RNA polymerase enzyme moves alo
Degger [83]

Answer:

The right answer is Letter A

Explanation:

The proposed model for the mechanism of initial transcription that suggests the entire RNA polymerase enzyme moves along the DNA is <em>transient-excursion model</em>, and the proposed model that is best supported by experimental findings is<em> scrunching model.</em>

<em>Because RNA polymerase leaves the promoter, translocate a short way along DNA template, synthesizes a short transcript before aborting transcript, releasing the transcript and returning to its original location on promoter. That is the transient-excursion model.</em>

<em>The scrunching model downstream DNA is pulled into the enzyme and has accumulated within the enzyme as single stranded bulges.</em>

<em>Experiments show that scrunching is right, experiments using single molecule analyses that allow the positions of different parts of polymerase to be measured relative to each other and to the template DNA during transcription.</em>

7 0
1 year ago
The Sun is the primary source of energy for ecosystems. The Sun emits______ . When an organism obtains nutrients by feeding on o
Burka [1]

This scientific law is called as Law of conservation of energy.

Sun is the primary source of energy .Energy once produced by the sun is then utilized by the organisms at various tropic levels. The energy is transferred from one organism to another. Energy is neither created nor destroyed. This is called as law of conservation of energy. Plants uses sunlight and make food   and the energy is then transferred to organisms eating it. When the organism dies the energy is released into the environment. This cycle continues and the the law of conservation of energy is maintained.

4 0
2 years ago
Read 2 more answers
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