Answer:
Option A, oxygen in the atmosphere
Explanation:
The highest level of oxygen reached during this phase of the geological cycle of earth. The oxygen level in Carboniferous period accounted for 35% as compared to 21% of oxygen in the atmosphere in present time.
Due to high oxygen content, the giant and wide varieties of terrestrial animal and plant species evolved. For example – size of insects and carwlies increased, plant became extremely giant, increase in number of tree ferns etc.
Abstract shapes that suggest plant forms or human anatomy without explicitly resembling anything nameable and allude to these natural organic forms are called <u>Biomorphic</u>.
These shapes may look like leaves, flowers, clouds—things that grow, flow, and move. The term biomorphic means: life-form (bio=life and morph= form). Biomorphic shapes are often rounded and irregular, unlike most geometric shapes.
Biomorphic forms are those that represent natural forms often in an abstract way, relying on contour, patterns, and textures to draw a connection to nature. This can appear in architectural or structural form, or in smaller, more decorative applications.
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Coal seams are far deep underground to be considered for opencast minings. These coal seams require underground mining. Since it is too deep underground, it can be used for mapping and correlation of sedimentary rocks or as a key bed.
Alfred has been in warm area your answer
Smooth muscles are the type of muscle that contracts and relax to control the movement of the contents.
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What are Smooth muscles?
Because it lacks sarcomeres and as a result, striations, smooth muscle is an involuntary non-striated muscle (bands or stripes). Its two subgroups are single-unit smooth muscle and multi-unit smooth muscle. A syncytium is the collective contraction of the sheet or bundle of smooth muscle cells that make up a single-unit muscle.
Smooth muscle makes up the walls of hollow organs including the stomach, intestines, bladder, and uterus as well as the blood and lymphatic vessels, as well as the tracts of the respiratory, urinary, and reproductive systems. The ciliary muscle, a type of smooth muscle present in the eyes, changes the shape of the lens by dilation and contraction of the iris.
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