Usually, volcanic ashes and cooled lava contain different minerals that plants can use. Therefore, usable.
Answer:
Book lungs
Explanation:
The horse shoe crab has a hard outer surface carapace which has the shape of a horse shoe.
It has book lungs which come in 5 sets. The lungs are usually found on the ventral side of the crab.
The book lungs acts as gills which is used in breathing when the horseshoe crab is in water . The book lungs also helps the crab to breathe on land for a certain period of time provided the lungs are moist.
<h2>Answer with Explanation </h2>
The elements that are required for the human body are in fixed percentages Whatever the weight of a person the percentage remains the same. Like 70-90% water is present in the human body whatever the weight of a person but the percentage of water remains the same in the body. There are six main elements present in the body which are basic and necessary for the human body are oxygen, nitrogen, carbon, phosphorus, calcium, and hydrogen.
Sensory neurons receive impulses and carry them from the sense organs to the spinal cord or brain. Interneurons connect sensory and motor neurons and interpret the impulse. Motor neurons carry impulses from the brain and spinal cord to muscles or glands. Draw and label the structure of a typical nerve cell.