Answer: B. Producers
Explanation:
A food chain is basically a sequence of transfer of food and energy when one organism is consumed by other organism in an ecosystem. In an energy pyramid linked with food chain the producers are present in the lowermost base level trophic level. These organisms exhibit the highest amount of energy as compared to other trophic levels. As these organisms are capable of producing their own food by process of photosynthesis by obtaining the energy from sunlight or by chemosynthesis. This energy decreases in subsequent trophic levels when producers are consumed by consumers.
Answer:
The correct answer will be option C- A structure upon which proteins are assembled.
Explanation:
A ribosome is a complex molecule machine formed of proteins and rRNA molecules which acts as a site for the synthesis of the proteins.
These ribosomes are present in the cell as a free entity suspended in the cytosol or attached to the endoplasmic reticulum.
Each ribosome is made up of a large and small component which translates the information coded in the mRNA in the form of codons to amino acids which join to form proteins.
Thus, option- C is the correct answer.
Skeletal and cardiac muscles are known as striated muscles, because the filaments of actin and myosin that power their contraction are organized into repeating arrays, called sarcomeres, that have a striated microscopic appearance.
Answer:
False
Explanation:
An aquifer is an underground layer of water-bearing permeable rock or rock fractures or. The system shows two aquifers with one aquitard. Some abundant small openings store a large quantity of water. Groundwater may exist in underground rivers or underground cave systems where water flows freely underground. If the impermeable area overlies the aquifer, pressure could cause it to become a confined aquifer.