Xylem vessel, that's the one that transport water and mineral ions up to the plant.
Answer:
Option C, At a subduction zone, oceanic crust is forced deep into the Earth.
Explanation:
At sub-duction zone, the dense oceanic plates coincides with the less dense continental plates and thus sink below the continental plates. Sometimes these oceanic plates being dense, sink to greater depth with in the earth’s mantle. The sub-duction zone causes earth quakes of high intensity when oceanic crust penetrates to greater depths of earth crust as they tend to change the rheology of the earths’ mantle and also causes bending of plates
Hence, option C is correct
Answer: during the course of infection the parasite, Giardia lamblia, pass through many anatomical locations to achieve its pathogenic effects which occurs in one host.
Explanation: infective form of the parasite is the mature cyst. Infection is acquired through ingestion of cysts in contaminated water or food. From the mouth the cyst passes down to the duodenum where it undergoes excystation. The cyst hatches out two trophozoites. By means of concavity on its ventral surface the trophozoites attaches to the epithelial lining of the small intestines. Encrustation occurs commonly in transit down the colon. Trophozoites retract the flagella into the axonemes, the cytoplasm becomes condensed and a thin tough hyaline cyst wall is secreted. As the cyst matures, the internal structures are doubled, so that when excystation occurs, the cytoplasm divides thus reproducing two trophozoites. Trophozoites are expelled through the anus with diarrhoeal stools.
Answer:
Answer is B.
Explanation:
The mitochondrial DNA is found in most eukaryotes mitochondrial, and it is an extranuclear double stranded DNA. It is known to be maternally inherited.
It produces adenosine triphosphate, ATP, which is useful to the cells, through the conversion of chemical energy in the food.
It was discovered that, there are about 2 to 10 copies of the mitochondrial DNA genome in each of the mitochondrion.
Answer: commensalism
Explanation: commensalism is a type of association between organisms.in this association,one organism benefits and derives nutrition from the other.the other organism is neither harmed nor gains anything.
this is compared to parasitism where one organism benefits and the other is harmed.it is compared to mutualism,where both organisms involves benefits.
In the case of the question,the birds derives nutrition from the activity of the ant and the ant is undisturbed by the birds
