Answer: FALSE (just took the test)
The hydrologic cycle is the flow of water from the Earth's surface via evapotranspiration to the atmosphere, where it condenses, and back to Earth in the form of precipitation. This cycle is important to the circle of life.
The 'granular material' visible within nucleus in a cell typically refers to nucleoli or chromatin. Nucleoli produce ribosomes, which are crucial for protein synthesis. Chromatin is a complex of DNA and protein that forms visible chromosomes during cell division.
In Biology, the reference to granular material visible within the nucleus usually implies to nucleoli or chromatin. The Nucleolus is a small dense spherical structure in the nucleus of a cell during interphase. It is composed of proteins and nucleic acids, and its main function is to produce ribosomes, which then move out of the nucleus and take positions on the rough endoplasmic reticulum where they are essential in protein synthesis. On the other hand, Chromatin is a complex of DNA and protein found within the nucleoplasm. They take the form of loose strands during interphase but condense to form visible chromosomes during cell division. The granules you observe are probably either of these two structures, depending on the stage of the cell.
#SPJ6
b. Reinforcement is a type of natural selection.
c. Reinforcement decreases the morphological difference between two incipient species.
d. Reinforcement is also called dispersive selection
The statements about reinforcement is true is that Reinforcement decreases the morphological difference between two incipient species.
Option C is correct.
Reinforcement is described as a type of natural selection that occurs when two populations that are becoming reproductively isolated from each other start to develop preferences for mates from their own population.
This can lead to a decrease in the morphological difference between the two populations, as they become more adapted to each other's mating preferences.
In conclusion, reinforcement is a type of natural selection, not the other way around. Option d is incorrect because reinforcement is also called assortative mating, not dispersive selection.
Therefore option B is correct
Learn more about reinforcement at:
#SPJ6
B) Many animals are captured or killed by poachers, significantly reducing their numbers.
C) Viral epidemics that break out in human populations spread to animals in the ecosystem.
D) Factories cause a significant rise in temperature in the forests, endangering many species.
Answer: A) Urbanization leads to deforestation and loss of habitat for many species.
Explanation:
Urbanization is the main reason for the exploitation of the rain forests which has lead to the extinction of species used to be residing in the forests ecosystems. Following are the factors which are responsible for such disaster with the expension of urbanization:
1. Infrastructure: The land is the main requirement which is responsible for the exploitation of rain forests. The large area is required for the accommodation of the large human population, construction of roads, highways and bridges. This has replaced many habit-ant animals from their native land and also leads to extinction due to ecological disturbance.
2. Increasing needs of food, herbs and wood: Many species of wooden trees could be found in the rain forests which have now extincted due to increasing demand for wood. The herbs have been wiped up for the preparation of medicines and drugs. The large number of tree populations are also exploited due to availability of fruits, and vegetables.
3. Wildlife trafficking and hunting: Some of the animal species have been included in the list of endangered species due to their use for commercial selling of horns, hives and other valuables.
could be a steroid hormone
does not pass through the cell membrane
binds to a receptor on the cell membrane
is this B?
(1) increased warming of local ecosystems
(2) increased exposure to ultraviolet light
(3) reduction in the pH of acid precipitation
(4) reduction in the frequency of floods and
droughts
Answer:
The correct answer is option (2) "increased exposure to ultraviolet light".
Explanation:
The ozone shield or the ozone layer is a region of the atmosphere comprised of high concentrations of ozone that absorbs most of the Sun's ultraviolet radiation. Therefore, damage to the ozone shield will cause increased exposure to ultraviolet light over the United States. This could cause harmful consequences such as an increase of cases of skin cancer, sunburn and cataracts.