I believe the correct answer from the choices listed above is option C. Magma that forces across rock layers hardens into a dike. <span>A </span>dike<span> or dyke, in geological usage, is a sheet of rock that formed in a fracture in a pre-existing rock body. </span>Dikes<span> can be either magmatic or sedimentary in origin.</span>
<span>The process is known as voiding cystourethrography.
In this process the urethra of a person is filled with radio waves blocking substance also known as radiocontrast substance commonly used agent is diaziotic acid.
They Xray study is done of urethra when the person empties his bladder. The report is then made which tells if there is any problem with urethra.</span>
Answer: b.They do not tolerate highly saline environments.
Mangroves are salt tolerant short trees that grows in coastal regions. They grow in extreme brackish or saline water. Therefore, they are called as halophiles. They exhibit a complex salt filtration system to remove out excess salt. They have two types of specialized roots systems they are impermeable to sodium salts. These roots contains suberin in order to decrease salt intake along with water. Salt which gets accumulated in the shoots is transferred to leaves which shed in old age. Hence, they excrete salts through leaves. They have stilt roots which are grown on the surface of soil.These roots have pores on their bark which allows the absorption of oxygen from the atmosphere.