The ciliary muscles behind the iris shape the lens by pulling the choroid up and relaxing the suspensory ligaments. The ciliary muscle changes the shape of the lens within the eye, not the size of the pupil which is carried out by the spincter pipillae muscle and dilator pupillae. When the ciliary muscle is relaxed, the choroid acts like a spring pulling on the lens via the zonule fibers causing the lens to flatten, and when the muscle contracts, it stretches the choroid, releasing the tension on the lens and thus they become thicker.
Answer:
Drastic Change
Explanation:
If a Keystone species was removed from its environment, the area would drastically change, due to the fact that the environment is largely dependant on that species, so removing it from the system would change the way the animals interact with the Environment.
Answer:
All of these are correct.
Explanation:
Immune system, reproductive system and nervous system are adversely affected by the contact of highly toxic chemicals because toxic chemicals have materials which is harmful for the cells that the cause of cell death or damaged the structure of the cell due to which the cell can't perform its function efficiently. All the system i.e. Immune system, reproductive system and nervous system are made up of cells so if the cells are damaged by these toxic chemicals the body systems are also negatively affected.
Answer:
False
Explanation:
Some chordates have their notochords all their lives, not gill slits. Gill slits form into gills.
Answer:
A#
x = NO3 ( NITRATE ION )
Y= NH3 ( AZANE )
Z = DICTRIFIC BACTERIA
B#
THE PROCESS OF OBSERVING NITRATE IS CALLED <em>NITROGEN</em><em> </em><em> </em><em>FIXATION</em><em> </em>
C#
NITROGEN FIXING BACTERIAS ARE
prokaryotic microorganisms which are capable for transforming nitrogen gas to fixed nitrogen component
D#
THE COMPONENTS RENTER THE SOIL IN WHICH THEY R BROKEN INTO MICROORGANISMS THAT IS KNOWN AS DECOMPOSERS