b. The sun
c. Terrestrial planets
d. Solar winds
Answer:
a. Material from previous stars
Explanation:
Solar nebula was a molecular cloud, composed of dust and gases from which the sun and planets were born. The solar nebula material came from the material from the previous stars. When a star dies, it expels out most of its mass and from this material, nebula is formed from which new stars and planets form.
Solar wind is composed of high speed charged particles emitting out from the sun.
Terrestrial planets have rocky surface.
b. Exponential growth curves show fast growth rates followed by slow growth rates.
c. No organisms in nature experience exponential growth rates.
d. Exponential growth curves are S-shaped.
The correct option is A.
Exponential growth curve is a type of curve that is obtained when a resource is abundant for a particular population of specie. In this case, the growth rate of each individual in the population remain the same and this makes the population to grow rapidly and increase in size. Exponential growth curve is J shaped and is usually found in R selected species. R selected species are those species that have short life span and high rate of reproduction. An example of this is mosquito.
The statement "exponential growth curves are common for R-selected species" is TRUE about exponential growth curves.
The r-selected species are composed of individuals whose reproduction is directly influenced by the biotic potential.
This biotic potential is also known as the maximum reproductive capacity, which is dependent on the carrying capacity.
Conversely, K-selected species are composed of individuals that can reproduce at a young age.
In conclusion, the statement "exponential growth curves are common for R-selected species" is TRUE about exponential growth curves.
Learn more about R-selected species here:
Greenhousegases are added to the atmosphere through forestfires. The correct option is A.
Greenhousegases are gases the gases which basically trap heat in the earth's atmosphere. The sun shines through the atmosphere during the day, warming the earth's surface.
The earth's surface cools at night, releasing heat back into the atmosphere. However, some of the heat is trapped in the atmosphere by greenhouse gases.
Greenhousegas emissions have far-reaching environmental and health consequences. They contribute to respiratorydisease due to smog and air pollution, and they cause climate change by trappingheat.
Other effects of climate change caused by greenhousegases include extreme weather, food supply disruptions, and increased wildfires.
Carbon dioxide, methane, nitrousoxide, hydrochlorofluorocarbons (HCFCs), hydrofluorocarbons (HFCs), and ozone are the main greenhouse gases whose concentrations are increasing in the loweratmosphere.
Thus, the correct option is A.
For more details regarding greenhouse gases, visit:
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Answer:
Dr. Leland Hartwell utilized the baker’s yeast; Saccharomyces cerevisiae
Paul Nurse used a different type of yeast, Schizosaccharomyces pombe, as a model organism.
Explanation:
Dr. Leland Hartwell utilized the baker’s yeast; Saccharomyces cerevisiae, as a model system, to study the enzymes that are involved in the control of mitosis including deriving the checkpoints concepts etc. Paul Nurse used a different type of yeast, Schizosaccharomyces pombe, as a model organism.
Answer:
d
Explanation: