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OverLord2011 [107]
3 years ago
10

What is represented by the base root of a phylogenetic tree?

Biology
1 answer:
NeX [460]3 years ago
7 0

The common ancestor.

A phylogenetic tree shows how a species originates (by evolution) other species. It’s very similar a genealogic tree. If you want your family tree, you should write down your name and the names of all your brothers and sisters and then draw a line from all those names to the names of your parents, and then draw a line from the name of your father to the names of your gramma and grampa, and then do the same with the names of your aunts and uncles. If you repeat the process with many, many generations, you will have the common ancestor to all of those relatives. You can do the same with species: for example, humans are supposed to have a common ancestor with monkeys, so their lines will end together in the same point in the graph. Then you have to draw a line from that point to another point that will be shared with other mammalians, then Mammalians share a point with other vertebrates, and so on… If you keep on going, you will get to LUCA someday.




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Looking at the diagram below, can you predict the tide time for the following day?
harina [27]

According to the graph, the times for high tide would be 1 AM and 1 PM.


The low tides would be at 7 AM and 8 PM.

5 0
3 years ago
Please help meeeeeeeeeeeeeeeeeeeeeeeeeee
Dmitry [639]

Answer:

1.) The two gametes found in humans are the sperm and the ova.

2.) Variation, in biology, any difference between cells, individual organisms, or groups of organisms of any species caused either by genetic differences (genotypic variation) or by the effect of environmental factors on the expression of the genetic potentials (phenotypic variation).

3.) Because the alleles that the mother and the father carry are mixed together in the offspring.

4.) Because it only introduces genetic variation into the population if a random mutation in the organism's DNA is passed on to the offspring.

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7 0
2 years ago
(03.02 MC)
Elenna [48]

The picture is a scientific model which is used to explain the concept of the water cycle by means of pictures and descriptions.

<h3>What is a scientific model?</h3>

A scientific model is a representation which may be in form of pictures, illustrations, objects, or ideas which are used to explain a particular concept by scientists.

Scientific models are usually employed to explain either difficult to understand concepts or scarcely observable phenomena in order to enrich the knowledge and comprehension of others.

The given illustration is an example of a scientific model. It is used to explain the concept of the water cycle. By means of pictures and descriptions, the various processes of the water cycle can be fully comprehended.

Also, by means of a cyclical illustration, the model helps to explain that the water cycle is a continuous repetitive process.

In conclusion, scientific models may be in form of pictures, illustrations or objects.

Learn more about scientific models at: brainly.com/question/18603376

#SPJ1

4 0
10 months ago
Match these terms with their descriptions
Pani-rosa [81]
1. water temperature of lakes and rivers rise - nuclear power plant. Water is used as a coolant to maintain the temperature of nuclear reactors. and the resulting water is warmed up.
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2.carbon monoxide pollutes air - </span> internal combustion engine. Internal combustion engines release fumes of carbon monoxide.
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3. fly ash of soot in air - </span>coal-burning power plant. Coal burning plants release  ash produced in small dark flecks.<span>

4. soil contamination of water resources - </span>DDT spraying in agriculture. DDT washes off agricultural land into water resources.
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5. sewage contamination of water resources -</span>population density. Urban areas produce a low of sewage, which is usually treated before being disposed of in rivers or the sea.
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6. excess plant growth in the lakes or rivers - </span>phosphate detergents. In many rivers, algal growth is limited by phosphate. Once excess phosphate is released to rivers, exponential algal growth can occur.<span>

7.reduces farmland and plant life to cleanse air - </span>urban sprawl. Urban sprawl uses up land for houses in an inefficient manner that could have been used for farming or natural areas.
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8. studies air,water, and land - </span>ecologist. Ecology is the study of <span>relations of organisms to one another and to their physical surroundings.</span><span>








</span>
8 0
3 years ago
girl of normal stature is born to two parents with achondroplasia who have very short stature, especially disproportionately sho
Lynna [10]

Answer:

Option D, Zero out of four (0%)

Explanation:

As we know,  achondroplasia is an autosomal dominant pattern. Now a girl having normal stature mate with a partner who also has a normal stature.

Thus let us assume -

Allele for disproportionately short arms and legs be represented by "A"

while allele for normal stature be represented by "a"

Now genotype of parents would be

Female - aa

Male - aa

Thus,

aa x aa

aa, aa, aa, aa

Thus, option D is  correct.

6 0
3 years ago
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