Answer:constriction of pupil
Explanation:the circularly arranged smooth muscle fibers in the highlighted structure ie the iris causes constriction of the pupil.
The iris basically has ciliary muscles that control Lens shape ,this happens when the ciliary muscles under the signal of the parasympathetic nervous system contract leading to the constriction of the pupil and when these muscles relax then dilation of the pupil will occur
Answer:
Hilda and her family are going on a sailing trip this summer, and Hilda is especially interested in spotting dolphins. In which zone of the ocean is Hilda most likely to spot dolphins? Hilda and her family are most likely to spot dolphins in the PELAGIC zone. To view shorebirds and crabs, Hilda should move towards the INTERTIDAL zone.
Explanation:
The Pelagic Zone
It is any water in an ocean or lake that can not be said to be positioned in proximity to the shore or in proximity to the bottom (the shore and the bottom are two distinct zones with a completely different properties.
Divisions of the Pelagic Zone
It can be grouped into subzones based on depth, we have the epipelagic, close to the top of the zone which as light been present, and the abyssopelagic, is nearer to the bottom with light being absent.
The intertidal zone
Its found between the high tide (upper limit) and low tide lines (lower limit), majorly on the beach at the water's edge.
The major attribute of the intertidal zone is that it is immersed with water at high tide and is in exposure to the air at lower limit. The intertidal zone is usually undergoing alterations leading to organisms that are uniquely adapted to strive there.
Organisms found in this zone are sea stars, crabs, mussels, barnacles, and various corals as they well situated to strive immersed in water and a region of their lives open air at lower limit.
Answer: water, wind, volcanic rock, sand, and other stuff that can pile up basically.
<span>The sac like fruting structures are present in the fungi belonging to the division Ascomycota. The fruting bodeis are called as ascocarp, and the spores are called as ascospores, which are non-motile.</span>
Answer:
The correct answer is (A) gene A is a positive regulator of gene B.
Explanation:
When positive regulation occurs a transcription factor is required to bind at the promoter in order to enable RNA polymerase to start transcription.
RNA means ribonucleic acid and it is a long single-stranded chain of cells that processes protein.
