Bacterial genetic recombination is characterized by DNA transfer from one organism called donor to another organism as the recipient and the result is the production of genetic recombinants, individuals. Those recombinant bacteria have a greater genetic variation because they carry, not only the genes they inherited from their parent cells but also the genes introduced to their genomes. There are three types of mechanisms that create genetic variations in bacteria (through recombination):
1. Transformation-that occurs when bacterium takes up a piece of DNA floating in its environment,
2. Transduction-occurs when DNA is accidentally moved from one bacterium to another by a virus (bacteriophage) and
3. Conjugation- when DNA is transferred from one bacteria to another through a tube between cells.
Those mechanisms of genetic recombination together with short generation time and random mutations allow bacteria to evolve very quickly and for example, create resistance to antibiotics.
Answer:
Prokaryotes are uni-cellular
Explanation:
Meaning they do not have more than one cell, for example; bacteria are prokaryotes.
Answer:
Males use a protein to detect pheromones sent by females.
Protein work as a chemical signal for the mating.
Explanation:
Pheromones are secreted by the individual of the similar species and they provide signals for communication by releasing a protein substance, they are like alarm substances.
This protein helps to guide females and males so that reproduction can occur.
Females beetles released sex pheromones into the environment, which give a signal of their mating availability.
Then these pheromones are detected by receptors present on the male beetles, and in this way, they find the females for mating .
Answer:
Cnidarian
Explanation:
Answer:
This would be a cnidaria
Explanation:
"any of a phylum (Cnidaria) of radially symmetrical, aquatic, invertebrate animals that have a hollow digestive cavity opening to the outside by a single opening surrounded by one or more nematocyst-studded whorls of tentacles, that occur as single or colonial sessile, typically columnar polyps or usually free-swimming, bell-shaped medusae, and that include the corals, sea anemones, jellyfishes, hydras, and Portuguese man-of-wars" -Mirriam-Webster
The correct answer is option D
Reflections from the surface warm the atmosphere.
Reason -Radiation is the process by which the earth radiates the heat absorbed by it during the day time. The earth absorbs the solar radiation during the day time and gets heated , during evening the earth emits the heat in the form of reflections i.e radiation due to which the hearth gets further heated up.
Answer:
He should get his mitochondrial haplotype sequenced, given the genetic variation in mitochondrial sequences compared to Y chromosomes.
Explanation:
A haplotype is a group of genes within an organism that was inherited together from a single parent. The word "haplotype" is derived from the word "haploid," which describes cells with only one set of chromosomes, and from the word "genotype," which refers to the genetic makeup of an organism.
Genetic variation is a term used to describe the variation in the DNA sequence in each of our genomes. Genetic variation is what makes us all unique, whether in terms of hair color, skin color or even the shape of our faces.
The typical metazoan mitochondrial DNA (mtDNA) is a double-stranded circular DNA molecule, which encodes a conserved set of 37 genes, including 13 protein-coding genes (PCGs) plus the two ribosomal RNA (rRNA) genes and 22 transfer RNA (tRNA) genes.
This, together with other special characteristics such as faster evolutionary rates than nuclear genes, presumed maternal inheritance, and absence of recombination makes mitochondrial DNAs one of the most popular targets for population genetics studies and accurate identification.