Answer:
The muscle fibers are pulled by the myosin and sarcomere together, resulting in the shortening of the fibres, but the sarcomere and myosin just move.
Explanation:
During muscle contraction, each sarcomere shortens, bringing the Z discs close together. There is no change in the width of the A band but both I bands and the H zone almost completely disappear. These changes are explained by actin and myosin filaments sliding past one another, so that the actin filaments move into A band and H zone. Muscle contraction thus results from an interaction between the actin and the mosin filaments that generates their movement relative to one another. The molecular basis for this interaction is the binding of the myosin to actin filaments that generate their movement relative to one another.
Answer:
a. commensalism is the correct answer.
Explanation:
By growing on the trunk or branch of a tree, a lichen gains height and exposure to sunlight for photosynthesis. The tree is not harmed by the lichen but does not benefit either. The relationship between the lichen and the tree is commensalism.
Commensalism is a relationship between two organisms where one organism gets benefits from other organisms without causing any harm or any damage from the relation as it one side symbiotic relation.
In this, we can see lichen is getting benefits from the tree.
for example, lichen is getting following benefits from the tree such as ( a lichen gains height and exposure to sunlight for photosynthesis.) and they are causing any harm to tree neither any benefits so this is a one-side symbiotic relation and thus the relationship is an example of commensalism.
DNA consists of two types of nitrogenous bases: Purine and Pyrimidine. Purine is a double ringed structure that includes Adenine (A) and Guanine (G) while pyrimidine is a single ringed structure that includes Thymine (T), Cytosine (C) and Uracil (U). In a DNA helix pairing takes place between one purine and one pyrimidine. A pairs with T and U (in case of RNA) and G pairs with C. During a mutation, it is more likely for A to get mutated to G than to T because A and G are similar in structure than T and C and the structure of DNA is not changed.
The answer of the given question above would be option D: bones. What ligaments hold together in a joint are the bones. <span>A </span>ligament<span> is a fibrous connective tissue which attaches bone to bone, and usually serves to </span>hold<span>s structures </span>together<span> and keep them stable. Hope this answers your question. </span>
Answer:
During meiosis 1, the parent cell with double the normal amount of chromosomes, splits into two diploid cells (have enough chromosomes to survive). During meiosis 2, the two diploid cells each split into two haploid cells (have half the amount of chromosomes to survive). Meiosis ends with four haploid cells.
