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madreJ [45]
2 years ago
10

Use an example to define and explain commensalism

Biology
2 answers:
Aneli [31]2 years ago
7 0
Commensalism is a relationship between two organisms where one receives a benefit or benefits from the other and the other is not affected by it. In other words, one is benefited and the other is neither benefited nor harmed.

example
Tree frog - The frog uses plants or trees for protection from the rain

gavmur [86]2 years ago
4 0

Commensalism is a symbiotic relationship in which one member benefits from the relationship, and the other is neither harmed nor does it benefit. Commensalism may be thought of as a positive-zero relationship in which one organism benefits, and the other is neither harmed nor hurt.

An example of commensalism is army ants that live in tropical areas. These army ants move across the rain forest and jungle and eat whatever they can find. Another kind of insect, a type of silverfish, marches right along with them. The silverfish are there in small numbers, and they don’t seem to compete for food with the army ants. The silverfish gain protection from predators by being in the midst of all the ants. They may get food left over from the ants. The silverfish benefit, while the army ants are neither harmed nor helped.

Hope This Helps

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Describe how DNA is modified for use in genetic engineering.
Alekssandra [29.7K]

Answer:

Genetic engineering can be described as a process in which the DNA of an organism is modified to change its characteristics or phenotype.

DNA modification occurs when a 'gene of interest' is taken from an organism and introduced into a vector such as a plasmid. Or this gene or piece of  DNA might directly be incorporated into another organism. The gene of interest incorporated into the DNA of a host will be able to express itself.

3 0
3 years ago
Sometimes genes, for no known reason, change their form in a process called spontaneous __________.
cupoosta [38]

Answer:

Mutation.

Explanation:

Mutation may be defined as the sudden heritable change in the DNA sequence of the organisms. Mutation can results in the change in the genotype and phenotype of the organisms.

Two main types of mutation are spontaneous mutation and induced mutation. Induced mutation occurs intentionally with the help of the mutagens. Spontaneous mutation is the natural mutation that occurs for the no known reason.

Thus, the answer is spontaneous mutation.

7 0
3 years ago
HELLPP! ITS BIOLOGY
larisa [96]

Answer:

So that in a guinea pig cross in the offspring the recessive trait —long hair— can be observed in 25%, the most probable genotype of the parents is heterozygous Ss.

Explanation:

In guinea pigs, for the characteristic<u> hair length, short hair is the dominant allele and long hair is the recessive one</u>.

In order for 25% of the offspring to express the recessive characteristic, the parents must have a recessive genotype, which can be seen in Punnett's Square:

P: <u>Ss X Ss </u>

<em>Alleles     S     s </em>

<em>S             SS   Ss </em>

<em>s             Ss    ss </em>

Where the offspring is:

  • <em>50% Ss with short hair phenotype </em>
  • <em>25% SS with short hair phenotype </em>
  • <em>25% ss whose phenotype would be long hair. </em>

According to this, heterozygous parents for the characteristic long hair in guinea pigs have a 25% chance of having offspring with long hair.

8 0
2 years ago
Documentation descriptive details of events in nature -amounts,sizes,colors,smell,behavior,texture -for example-eclipse observat
Korvikt [17]

Answer:

field studies

Explanation:

The documentation and collection of descriptive details of events in nature such as amounts, sizes, colors, smell , behavior, texture e.t.c are all categorized as field studies.

It involves the gathering of raw data outside a laboratory.

  • Often times, based on the needs of an experiment, it is desirable to corroborate laboratory studies with field evidences.
  • The approach in gathering such data varies from discipline to discipline.
  • Most field sampling are usually done in an uncontrolled environment.
4 0
3 years ago
List three machines or devices that depend on gravity to work.
meriva
Gravity is a force which causes objects to fall or be still on the earth's surface. This invisible force has been longed explored mainly by many scientist however, Isaac Newton was first to conceptualize this into a proper principle. 

GravityLight is a device that was recently developed by engineers that is designed to produce light through the force of gravity. 
8 0
3 years ago
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