Answer:
The whale is heterotrophic.
Explanation:
Energy is needed by organisms to perform their life functions. Organisms, in nature, feed on one another for energy source. Some organisms are, however, capable of synthesizing their own food or energy source via a process called photosynthesis. This is the case of the phytoplankton in the question. These organisms are, therefore, called AUTOTROPHIC ORGANISMS or PRODUCERS.
On the other hand, some organisms are incapable of this self-production of energy source. Hence, they rely on other organisms for it. These category of organisms are called HETEROTROPHIC organisms, which is the category the large whale fall into due to its dependence on phytoplankton for energy source.
Answer: The correct answer is b. Syphilis.
Syphilis is a type of sexually transmitted disease and the causative agent is bacteria called Treponema pallidum. There are four stages of syphilis: primary, secondary, latent and tertiary. It is a highly contagious disease.
The disease starts to get spread from sores and the pregnant women can pass the disease to the child and can cause abnormalities or even death of the child. If syphilis is untreated till the tertiary phase, it can lead to problems in heart, blindness, deafness, brain, nerves leading to paralysis and even death.
Answer: The sensual aspect of intercourse became more important.
Explanation:
There are different development stages in humans; from infant to adolescent to adulthood. The word "When humans begins to walk upright' shows the development stage of maturity. This usually takes place in adolescents. The sensual aspect of intercourse became more important. Sex is one of the drives that is behind every thought, feeling, and behavior.
The food web (in contrast to the food chain) means that there may be more than one organisms competing for the same prey or food or they may be one organism that preys on many kinds of food etc. It is more complex than the food chain. If the food source of a certain animal was added to the food web, meaning there will be other organisms competing for that food source, then the population of that certain animal will either decrease (if the animal is not fit for the competition of food), or become constant or even rise (if the animal is well suited for the competition).