Answer:
70 seeds
Explanation
5 is the food for a mouse (day)x2 mice for cat=10. 10x7(week)=70 seeds
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Angiosperms are flowering plants. The carpal is a reproductive organ within the flower. The carpal is the female organ at the center of the flower and it consists of the ovary, style, and stigma. The ovary is the lower part of the pistil that ripens into a fruit and it consists of the ovule.
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DNA comparisons was developed after Darwin's time and have become an important method for studying evolution.
While Darwin was able to make observations of variation and adaptation in different species, he did not have access to the genetic information that DNA provides. It wasn't until the discovery of the structure of DNA in 1953 that scientists began to explore the use of DNA in studying evolution.
Since then, DNA sequencing and comparisons have become increasingly important tools in the study of evolutionary relationships and processes.
In science, DNA comparison is a ground-breaking technology. It has given researchers the ability to compare and contrast DNA samples with previously unheard-of accuracy.
Researchers can learn a great deal about genetic links and diseases as well as create brand-new remedies for illnesses by examining these traits.
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Answer:
The correct answer would be lac repressor.
Lac repressor refers to the DNA binding protein which inhibits or prevents the expression of genes in the DNA of Lac Operon.
The lac repressor protein is expressed by the Lac regulatory region.
It binds to the operator region of the operon and prevents the binding of RNA polymerase.
b. speciation
c. convergent selection
d. stabilizing selection
Speciation occurs when a population suffers divergence. Genetic flow is interrupted between the new groups that keep reproducing and going through mutations. Reproductive isolation emerges. Option B. Speciation.
Occurs when the original population is divided into two or more groups and each group is exposed to different environments.
Each group reproduces for many generations, going through many changes or mutations.
These changes will depend on each group's environment and its ecological pressures.
Pressures act on individuals and make them adapt to the new environmental conditions.
Generation after generation, the genotype of individuals will increase the fitness to survive and reproduce.
The fixation of mutations will increase the difference among both groups, up to the diverging point into two new species.
There are different types of speciation. One of them is Allopatric speciation.
Allopatric speciation refers to the geographical separation of a continuous genetic population, originating two or more new geographicallyisolated groups.
During these events of speciation, emerging new barriers impede genetic flow between groups. The two new populations that are separated can not get together and mate anymore.
These barriers might be geographical or ecological.
After the emergence of the barrier, the two populations evolved separately in different new species.
Two different species that evolved in allopatry might meet again in secondary contact if the barrier that separated them, disappears. However, they will not be able to mate and reproduce due to prezygotic and postzygotic reproductiveisolation.
The exposed example is a case of speciation, in which the chimpanzees' habitat was fragmented and a town was built.
The town acts as the barrier between the two diverged groups, impeding them to meet.
Genetic flow is interrupted and each group keeps reproducing separately, and mutating, leading to genetic changes and reproductive isolation.
After a long period of time, the chimpanzees came back into contact but were incapable of breeding.
This process is speciation. Option B.
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density-dependent factor
population-dependent factor
population-independent factor
Answer : Option B) Density - dependent factor.
Explanation : Typhoid outbreak is dependent of the density as the people of the region are getting the water from the same source so, the density of the area is also an influencing factor in spreading the disease. The bacteria is also getting transmitted from one human to other human too.
The type of limiting factor that was involved in the outbreak of typhoid fever that occurred in Ithaca was the density-dependent factor.
Typhoid fever is an acute bacterial disease caused by Salmonella enterica serotype Typhi, with worldwide distribution. The disease is directly associated with low socioeconomic levels, especially in regions with poor basic sanitation, personal and environmental hygiene.
With this information, we can conclude that the outbreak of typhoid fever depends on density, as people in the region are receiving water from the same source, therefore, the density of the area is also a factor that influences the spread of the disease.
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