"Prokaryote" is shown in the given image.
Answer: Option A
<u>Explanation:</u>
A prokaryote is a single-cell organism which is deficient in a membranous nucleus, mitochondria, or any other membranous organs. Prokaryotes are categorized into two domains: Bacteria and Archaea. At the third domain: Eukaryota, species with nuclei and organelles are located.
The asexual prokaryotes reproduce without fusion of gametes. They are considered as first living organisms. In the prokaryotes components like proteins, DNA and metabolites, overall the intra-cellular water-soluble components are enclosed by the cell membrane as situated together in the cytoplasm, rather than in separate cellular compartments.
Answer:
Because older cultures of gram-positive bacteria tend to lose their ability to retain crystal-violet in the peptidoglycan of their cell walls and can be confused with gram-negative bacteria.
Explanation:
Gram staining is used to differentiate between two major groups of bacteria. Gram-positive and gram-negative, these bacteria differ in the amount of peptidoglycan in their cell walls. Gram-positive bacteria have a higher amount of peptidoglycan, which absorbs the violet crystal complex used in gram staining, staining them purple/violet. Old cultures of gram-positive bacteria tend to lose the ability to retain the violet crystal and are stained by safranine, staining them red/pink and appear to be gram-negative.
<u>Answer</u>:
"It increases the mutation rate" is an advantage of sexual reproduction
<u>Explanation</u>:
The basic thing of evolution is fundamental, as it helps in generation of genetic variation on which the selection can act. Sexual reproduction leads to genetic diversity, and this genetic diversity leads to increase the mutation rate. Genetic diversity occurs because of two various cells which are combining together and biological assortment which happens at the time of cell division. Neutral genetic diversity in the population leads to high mutation rate.
Answer:
Same phenotype but different genotype is possible due to presence of dominant allele
Explanation:
A person can have a dominant allele on both the homologous chromosomes while another person may have single dominant allele and a corresponding recessive allele.
Answer:
There are many reasons why teachers should take children on a field trip. Some of them are:
1) The children tend to learn more form field trips.
2) Planning to visit cultural areas allow students to learn and visualize the cultural heritage of a city.
3) The children are better able to communicate with one another.
4) The teachers can get a better understanding about any child from a field trip.
5) Once in a while, some fun must be added to the schedule of the children and what better way other than a field trip.
