Answer:
a. pathogens
Explanation:
Infectious diseases are caused by pathogens, which are microorganisms such as bacteria, viruses, fungi, or parasites that can invade the body and cause disease. These pathogens can be transmitted from person to person through various means, such as direct contact, airborne droplets, contaminated food or water, or insect bites. They are capable of multiplying and spreading within the body, leading to infection and the onset of symptoms.
b. partly moveable joints.
c. movable joints.
d. none of the above
Answer:
C. axial and appendicular.
bronchi
blood stream
diaphragm
Answer:
Animal bioenergetics is the study of how animals convert food into energy and biomass. The amount of energy that is converted into biomass is called the net production. The net production pyramid is a graphical representation of the amount of net production at each trophic level in an ecosystem.
There are two main factors that explain why the net production pyramid is shaped like a pyramid:
Trophic efficiency: Trophic efficiency is the percentage of energy that is transferred from one trophic level to the next. In most ecosystems, trophic efficiency is relatively low, typically ranging from 5% to 20%. This means that for every 100 units of energy that are produced by the primary producers, only 5 to 20 units of energy are available to the primary consumers.
Biomass loss: Not all of the energy that is converted into biomass is retained by the organism. Some of the energy is lost as heat, and some of it is used for metabolic processes such as respiration. As a result, the amount of biomass at each trophic level is always less than the amount of biomass at the previous trophic level.
The combination of these two factors results in the net production pyramid having a pyramidal shape. The primary producers have the most biomass, and the biomass decreases at each successive trophic level.
There are some exceptions to the shape of the net production pyramid. For example, in some ecosystems, the biomass of the primary consumers may be greater than the biomass of the primary producers. This can happen in ecosystems where the primary producers are small and short-lived, such as in a desert ecosystem.
The net production pyramid is a useful tool for understanding the flow of energy through an ecosystem. It can be used to track the amount of energy that is available to different organisms in the ecosystem, and it can help to identify the limiting factors that affect the productivity of the ecosystem.
Explanation:
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