Answer:
Explanation:
Certain types of volcanic ash do not dissolve easily in water. Instead, they clump on the surface of the ocean in pumice rafts. These rafts can clog salt water intake strainers very quickly, which can result in overheating of shipboard machinery dependent on sea water service cooling.
Answer:
Monotremes, marsupials, and placentals are the three animals that could match this phylogenetic tree.
Explanation:
Monotremes, marsupials, and placentals belong from a common ancestor. Those organisms which have one common ancestor are also called monophyletic. These animals have some changes which occurs with the passage of time but most of characters are similar to each other. In placentals animals placenta is present while in Monotremes and marsupials this placenta is absent.
Answer:
Primary active transport.
Explanation:
Active transport may be defined as the movement of particles against the concentration gradient. This is the energy driven process that requires ATP to transport the molecules.
Two main types of active transport are primary active transport and secondary active transport. The calcium has been moved towards its region of higher concentration ( sarcoplamsic reticulum) from its region of lower concentration (cytosol), this transport is against the concentration gradient. The ATP is used by direct hydrolysis. Hence, it is the primary active transport.
Thus, the answer is primary active transport.
The menstrual cycle is complex and controlled by many different glands and the hormones that these glands produce.
The four(4) phases of the menstrual cycle are:
(1) menstruation.
(2) the follicular phase.
(3) ovulation .
(4)the luteal phase.
Common menstrual problems include heavy or painful periods and premenstrual syndrome (PMS).
The correct answer is d
i think