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VARVARA [1.3K]
3 years ago
10

2. Which of the following accurately describes the flow of energy through ecosystems? A. All of the energy found within a primar

y producer is transferred to a first-level consumer. B. Energy is always passed from the consumer to the primary producer. C. The percentage of the original energy from producers that's available to the consumer is quite small. D. A third-level consumer would store a greater portion of energy from the previous level than would a second-level consumer.
Biology
1 answer:
RUDIKE [14]3 years ago
8 0
I would say C because you start out with the sun, the original source of energy, and the energy goes to the plants, primary producers, which obtain all the energy and make food and also store some "for later", but when the insects, primary consumers, eat the plants they don't get all the energy that the plants had originally taken in, they only get what they had stored "for later" and the rest of the energy dissipates as heat. And the same thing continues up that chain, when frogs eat insects, they don't get all the energy that was in the insect, their stored energy is lost.  Hopefully this helps :)
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Swollen shoot is a viral disease transmitted to the plant by mealybugs that has devastated Ghanaian and Nigerian cocoa crops.

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28. True or false: Ground beef labeled "75 percent lean" is a good
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Answer:

False

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Ground beef labeled 75% lean could be a good choice, but that is because it contains only 25% fat, not 25% of its calories come from fat.

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3 years ago
Antibodies are composed of two types of peptides, heavy chains and light chains. One of the major classes of antibody molecules
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Answer and Explanation:

a. form the antigen-binding site ⇒ both chains

The antigen-binding site is formed by one hypervariable region of the light chain (VL) and one hypervariable region of the heavy chain (VH). So, both type of chains contributes to antigen recognition.

b. contain multiple variable domains ⇒ none

Both chains - light and heavy - contain <u>only one</u> variable domain (VL and VH).  

c. are found in the Fab fragment ⇒ both chains

The Fab fragment is composed of portions of both light and heavy chains: each portion contains one variable domain and one constant domain. The Fab fragment binds specifically the antigen.  

d. are found in the FC fragment ⇒ heavy chains

The Fc region is composed of portions of heavy chains (CH² and CH³), so it contains constant domains.  

e. contain only one constant domain ⇒ light chains

Each light chain contains one variable domain (VL) and one constant domain (CL).  

f. contain multiple constant domains ⇒ heavy chains

Each heavy chain contains three constant domains: CH¹, CH² and CH³.  

g. contain only one variable domain ⇒ both chains

Both light and heavy chains contain one variable domain. The difference is given by the number of constant domains: light chains have 1 constant domain while heavy chains have 3 constant domains.

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The correct answer is anaerobic exercises. Anaerobic exercises is an intensely done activity, wherein the body’s call for oxygen goes beyond the oxygen source accessible within the body. Anaerobic exercises feeds on the energy sources that are stored in the muscles of the body, which is why it is the exercise that targets muscle cells for maximum demand of energy.

 

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True or false: Most muscles contain a combination of all three muscle types, slow oxidative, fast oxidative, and fast glycolytic
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Thanks to what we know about muscles and the fibers they contain, we can confirm that the statement in the question is in fact true.

Muscle is a type of tissue which due to coordinated systems that make up their composition, have the ability to contract. This ability allows for greater efficiency. In humans, the muscle systems are classified into three kinds:

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Despite the different classifications and functions of each muscle type, each of these muscles contains a combination of three types of muscle fibers, which are the fibers listed in the question:

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