D) The AV valves are supported by chordae tendineae so that they do not blow back up into the atria during ventricular contraction.
Answer:18 kcal
Explanation:
Law of ecological pyramid - the production of organisms of each subsequent trophic level is always on average up to 10 times less than the production of the previous one
1800/10=180
180/10=18
Answer:
Palatilism
Explanation:
Due to one organism benefiting (tapeworm ) while the other organism is harmed (dog)
Answer: 1. Magnetic lines of force start from the North Pole and end at the pole, they're continuos through the body of the magnet
, Magnetic lines of force can meet up with iron more easily than air.
, Two magnetic lines of force can't intersect one another, they have a tendency to contract longitudinally., they have an inclination to expand laterally.
