D is not a requirement as good fuel can be in liquid as well as gaseous in nature
The correct answer is meat and cheese
Proteins are mostly found in abundance in animal products. Eggs are also a great source of them which is why animal products should be consumed as proteins are necessary for the functioning of the body.
A meander forms when moving water in a stream erodes the outer banks and widens its valley, and the inner part of the river has less energy and deposits silt. A stream of any volume may assume a meandering course, alternately eroding sediments from the outside of a bend and depositing them on the inside.
Answer:
The endometrial lining is shed during menstruation and is then regenerated by the hormone estrogen.
Explanation:
The menstrual cycle can be described in terms of:
1. <u>OVARIAN cycle</u>: divided into
-Follicular phase of variable length lasting between 7 and 21 days.
-Ovulation
-Luteal phase which is fairly constant and lasts between 12 and 16 days.
The most common cycle length is 28 days and this occurs in 15% of women in their reproductive age
.
The duration of flow is between 2-6 days.
2. <u>ENDOMETRIAL cycle</u>: divided into
-Proliferative phase where there is increase in growth of the functional layer and the endometrial glands under the influence of oestrogen.
-Secretory phase where endometrial changes are influenced by progesterone activity.
The endometrium is made up of the basal layer and the functional layer.
The basal layer remains intact throughout the cycle while the functional layer is shed during each menstruation.
Answer:
Anaerobic respiration refers to the break down of food (sugar) in absence of oxygen in order to produce energy (ATP or adenosine triphosphate).
In yeast, alcoholic fermentation takes place by which glucose is converted into ethanol (alcohol), carbon dioxide (CO₂), and energy (ATP). It helps in regeneration of NAD⁺ lost during glycolysis. No electron transport chain is required in this process.
The overall reaction can be written as:
Glucose → Pyruvate → Ethanol + Carbon dioxide + ATP.
Contrary, in anaerobic bacteria respiration takes place by using electron acceptor other than oxygen such as sulfate, nitrate, sulfur, fumarate etc. Hence, electrons are passed through a electron transport chain which are finally accepted by any molecule other than oxygen.
Other molecules have less oxidizing potential as compared to the oxygen and thus less energy is released per oxidizing molecule. It makes the anaerobic respiration less efficient as compared to the aerobic respiration.
Examples of anaerobic microbes are methanogens (<em>Methanosarcina barkeri </em>uses CO₂ as final electron acceptor), Desulfuromonadales (uses sulfur as final electron acceptor) etc.
