Answer:
The fix nitrogen into free nitrogen which is a usable form. They also bring nitrogen back into the system by decomposing dead organisms.
Answer 2.
Because, they are known as nitrogen fixing bacteria. These organisms convert nitrogen in the soil to ammonia, which can then be taken up by plants. After nitrogen has been fixed, other bacteria convert it into nitrate, in a process known as nitrification.
Both answer is correct choose the best choice for you.
Hope this helps!
Answer:
Hydrogen bonding
Explanation:
The newly synthesised proteins as a result of the process of translation are linear structures formed by linear arrangement of amino acids.
The linear structure of a protein is known as the primary structure which changes its conformation and take the shape of either the helix or the pleated sheet. This helical or pleated sheet structure is known as a secondary structure.
The secondary structure is formed due to the bond formed between the hydrogen of the carbonyl group and the amino group which form the backbone of the protein structure. The hydrogen bond causes the linear polypeptide to form spiral helical or bend pleated sheet.
Thus, Hydrogen bonding is the correct answer.
Answer: It absorbs light.
Explanation: Chlorophyll is a pigment inside of all trees and plants. Plants absorb light, if the chlorophyll is green, then it will change the plant, and make it look green. It can change depending on the day, and temperature. If it is fall, the leaves cannot eat, and change to red. If the temperature is normal, say 90 degrees, the leaves are healthy, and eat. This helps them stay green.
False.
You could be taking many other courses related to "science" and learn that stuff.
Q1. The answer is muscle fibers.
Muscle fibers are actually muscle cells and, thus, they are a basic unit of a muscle. Muscle fibers are sheathed by endomysium of collagen fiber. They are bundled into fascicles and sheathed by perimysium. Fascicles are bundled into muscle tissue and sheathed by epimysium. Muscles are connected to bones by tendons while ligaments join one bone to another.
Q2. The answer is Endurance activities.
Two general types of skeletal muscle fibers are fast-twitch and slow-twitch muscle fibers. Slow-twitch muscle fibers are important in aerobic exercises which involve low levels of exertion but for long periods of time. Those are endurance activities during which muscles are used below their maximum contraction capacity but for a long time. For example, in a marathon, slow-twitch muscles are used.
Q3. The answer is a motor unit.
A motor unit consists of a motor neuron and the skeletal muscle fibers that are innervated by that motor neuron. When an action potential reaches the end of the motor neuron, it will induce a release of neurotransmitters from it. Neurotransmitters pass through the synaptic cleft and bind to the receptor on the muscle fibers and induce muscle contraction.
Q4. The answer is <span>All or none principal.
All or none principal is the principal that explains that strength of a muscle fiber contraction does not depend on the strength of the stimulus. If the stimulus passes the threshold, the muscle fiber will contract. If the stimulus does not pass the threshold, the muscle fiber will not contract. Simply, it will be or it will be not contraction, but there cannot be a little or a great contraction depending on the strength of the stimulus.
Q5. The answer is striated muscles.
Striated muscles are called striated because of the series of sarcomeres, basic units of striated muscles. Contraction of these muscles is voluntary (except for the heart muscles). During these contractions, the muscle is extended by the action of an antagonist muscle. They are made up of long cylindrical fiber and attach to the bones.
Q6. The answer is </span>Smooth muscles.
Smooth muscles are opposite to the striated muscles. They are not striated and their contractions are involuntary. They are found in internal organs and what is important, they can stretch or maintain tension for long period of time. This is especially important for organs, such as urinary bladder or intestines. Imagine a bladder that can be stretched for long period of time and that is thanks to smooth muscles.
Q7. The answer is Cardiac muscles.
As their name suggests, cardiac muscles or heart muscles can be found in the heart. They are involuntary and striated muscles. Cardiac muscles are highly specialized muscle cells and provide blood pumping through the body. Because heart must pump blood all the time, these muscles must have high contractile strength and endurance.