The worm feeds via a "pumping" action in which it first uptakes the fluid surrounding it. Then, it expels the fluid while trapping any bacteria within it. The bacteria are then digested for energy and nutrients.
They are less likely to be separated during crossing over.
Answer:
b. Menopause
The end or cessation of menstruation is called menopause.
Explanation:
Menopause is the event when menses stop. Climacteric is more adequate to refer to the diseases associated with the decrease of ovarian function that will lead later to the event when menstruation cease, commonly known as menopause.
On the other hand, amenorrhea is the absence of some menstruation periods but during the reproductive period of a woman, and menarche is called to the event when the first menstrual cycle occurs.
An oxygen atom alone will have 6 valence electrons (outermost electrons). A hydrogen atom each has 1 electron in its outermost shell to share with the oxygen. For oxygen to have a filled outer shell, it will take one electron from each of the two hydrogens into it's outer shell. This means, the number of electrons in its valence shell will be the original amount of electrons oxygen has by itself plus 1 electron from each hydrogen atom. This will form a water molecule