Answer:
Explanation:
Sunflowers use a cross-pollination method of reproduction by attracting animals and insects such as bees and using them to spread reproductive pollen from one flower to another as well as the seeds the folower produces.
Answer:
"The control experiments are basically done to compare the main experiment and the experiment done in controlled manner so as to observe the changes and also to minimize the changing effect"
Explanation:
The scientists include the control in their experiments which can help them to minimize the changes and can observe the changes meticulously. In control experiment the observation are made with minimum effect of the variables leaving the independent variable. This type of experiments help in increasing the reliability of the output. The control experiments are basically done to compare the main experiment and the experiment done in controlled manner so as to observe the changes.
B. Human populations have not yet completed the demographic transition
C. Human populations do not conform to the logistic model
D. Science and technology have made it possible
Most of the worldwide human population is growing exponentially because B. Human populations have not yet completed the demographic transition.
It should the exponential growth means that the population is just experiencing the first stage of the demographic transition.
Most of the worldwide human population is not growing exponentially due to science and technology. The fact that human populations have not yet completed the demographic transition is the main reason for the exponentialgrowth.
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Explanation:
B. Human populations have not yet completed the demographic transition
Human populations may experience several stages of development, which can be measured through rates of birth and death. This model, demographic transition measures population changes over time.
During the initial stages of the demographic transition, populations experience high death rates and high birth rates. Successive stages involve steadily increasing birth rates, falling death rates and later, low birth and death rates. At the final stage, the birth rates experience a stark decline.
Thus, the exponential growth means that the population is just experiencing the first stage of the demographic transition.
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More recently than Darwin's theory some scientists have discovered the identity of the Last Universal Common Ancestor (LUCA)
Answer:
B
Explanation:
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Oyster is a type of aquatic organism that significantly require oxygen for its survival and other metabolic processes.
A Population may be defined as the group of individuals belonging to the same species living in the same area at a particular time period. It includes the members of the same species.
The population of oysters requires at least 2-3 ppm of dissolved oxygen in order to survive in the aquatic environment. But if this amount of dissolved oxygen may alter it may significantly affect the population of oysters.
The higher level of dissolved oxygen is not a reason for much concern, but lower levels may be the potent cause for the reduction of the oyster population within the ecosystem.
Therefore, the Oyster is a type of aquatic organism that significantly require oxygen for its survival and other metabolic processes.
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