In biology, the strain is a low-level taxonomic rank used in different contexts:
In microbiology, a strain is a part of a bacterial species different from other bacteria of the same species by a minor but identifiable difference. Strains are often created in the laboratory by mutagenesis existing strains or wild-type examples of bacterial species.
In zoology, a strain corresponds to an individual or group of individuals who are at the origin of a line of descendants, sometimes called the holotype, paratypes, etc. A strain is a population of organisms that descends from a single organism or pure isolate culture. Strains of the same species may differ slightly from each other in many respects.
A strain thus consists of a group of organisms of the same species possessing certain differential traits based on their relationship; either they come from the same region, as the same watershed of a river, or they are the fruit of a particular breeding program (exists as a whole interbreeding without introductions from external sources).
4 is nucleus because it’s in the middle
Answer: Species A is diploid, it means 2n=36, the haploid number is 36/2=18. Species B is triploid, it means 3n=36, then the haploid number is 36/3=12.
Explanation:
A chromosome is an ordered bundle of DNA associated with proteins such as histones, and it is found in the nucleus of the cell. Different organisms have different numbers of chromosomes. Humans, for example, have 23 pairs of chromosomes, 22 of them are autosomal pairs, and one pair are sex chromosomes, which indicates the sex of a person. Each parent contributes one chromosome from his or her autosomal pair and one from the sex pair, so that the offspring get half of their chromosomes from their mother and half from their father.
<u>A haploid cell has only one set of chromosomes (n), whereas diploid cells have two sets of chromosomes (2n) and triploid cells have three sets (3n). In the example of humans, a diploid cell is a somatic cell and has 46 chromosomes (or 23 pairs). And a haploid cell, a gamete for example, has 23 chromosomes. </u>
If two species of plants carry 36 chromosomes, and species A is diploid, it means 2n=36. Then the haploid number is 36/2=18. Species B is triploid, it means 3n=36. Then the haploid number is 36/3=12.
<span>d. bacteria</span><span>
Decomposers, as their name strongly suggests, decompose matter, more specifically dead matter and waste materials. These decomposers break down the dead body of the once living organisms and the living organisms' waste materials to their basic state and disposition. </span>
<span>Smell often trigger vivid memory<span>. This is because of the anatomy of the olfactory pathway. The nasal mucosa senses odorant molecules wherein the olfactory nerve will transduce the signal to the olfactory bulb to the olfactory cortex, bypassing the thalamus (unlike other senses) Anatomically and physiologically, the olfactory cortex is closely related to the amygdala which is associated with memory formation.
</span><span><em>Primary example is that a certain smell of a perfume of your ex-lover can trigger vivid memories even if it was many years ago.</em></span></span>