<span>The answer is Leukoplakia.
When you have this condition, there is a thickened, white patches that form on
your gums, the interiors of your cheeks, the bottom of your mouth and, occasionally,
your tongue. These patches can't be scratched off. Specialists don't know what the
source of leukoplakia is but consider chronic irritation from tobacco — whether
dipped, smoked, or chewed — to be the main reason in its development. Most
leukoplakia patches are noncancerous meaning that they are benign, though some
show initial signs of cancer. Cancers on the bottom of the mouth can happen
next to areas of leukoplakia. And white areas varied in with red areas
(speckled leukoplakia) may specify the potential for cancer. </span>
Protozoan infections are parasitic diseases caused by organisms formerly classified in the Kingdom Protozoa. They include organisms classified in Amoebozoa, Excavata, and Chromalveolata. Examples include Entamoeba histolytica, Plasmodium (some of which cause malaria), and Giardia lamblia.
Answer:
D. Both lack membrane-bound organelles and are single-celled.
Explanation:
All prokaryotes are classified in two domains Archaea and Eubacteria as they differ in some characteristics. But as they both are prokaryotes there is some similarities between Archaea and Eubacteria that is they both are single celled and lack membrane-bound organelles.
They both reproduce asexually by binary fission but both are autotrophic and heterotrophic. They both are unable to survive in lack of oxygen. They both have circular DNA and not helical DNA.
Hence, the correct option is D.
An example of a postzygotic mating barrier, low hybrid viability .
Hybrid offspring are born but have lower fitness and are therefore less likely to reach sexual maturity. Another example is where hybrid offspring is healthy but unable to breed.
Postzygotic mating barriers reduce the reproductive capacity of hybrid offspring. The three types of postzygotic barriers are hybrid zygote abnormality, hybrid infertility, and low hybrid viability . Many research theory suggests that incompatibility alleles those who have evolved neutrally are not able to be maintained in secondary contact.
To learn more about Postzygotic mating barriers , here
brainly.com/question/14171722
#SPJ4
Answer;
- Reticular activating system (RAS)
Explanation;
-The light of dawn and the buzz of an alarm clock lead to wakefulness through the reticular activating system.
-The RAS is a network of neurons that are located in the brain stem, they project anteriorly to the hypothalamus to mediate behavior, as well as both posteriorly to the thalamus and directly to the cortex for the activation of awake, desynchronized cortical EEG patterns.
