Answer:
Cilia and flagella arise from the centrioles
Explanation:
Some cells have projections made up of microtubules and covered by extensions of the plasma membrane.
These projections can be cilia or flagella.
Centrioles are also made of microtubule from which the cilia and flagella arise. It also takes part during cell division
Basal bodies are protein structures found at the base of cilia and flagella. It functions as a site starting point for the growth of microtubule for the cilia and flagella
Answer:
The answer is B- no muscle tension could be generated
Explanation:
During contraction cross bridges are formed by the myosin thick filaments grabbing on to the actin thin filaments. . The overlap of the thick and thin filaments allows myosin to bind to actin. As more bridges are formed, more myosin will pull on actin and more tension will be produced. Muscle tension is a condition in which the body remains semi-contracted for a longer time, it is caused when muscles contracts and do not release.
However, if the muscles are stretched to a point where the thick and thin filaments no longer overlap there will be no muscle tension generated.
Intensive farming practices include growing high-yield crops, using fertilisers and pesticides and keeping animals indoors.
Answer:
The activity which causes the least amount of wetland and estuary degradation when it occurs near the coast is:
A. dune grass rehabilitation
Explanation:
This is actually a rehabilitation effort, unlike the other three options that cause land degradation. A dune grass rehabilitation accretes sand and minimizes the rates of beach erosion. The program tries to protect coastal infrastructure and upland properties from storm damage by planting vegetation, fencing off sensitive areas, blocking storm surge, creating dune walkways, and absorbing wave energy. During dune grass rehabilitation, activities that adversely affect the dunes are avoided.
Answer:
Ducks have flat broad beaks with tooth-like edges. They use their beak to take in muddy water which has insects, worms, etc. The mud and the water flow out of the holes on the sides. The worms and insects inside the mouth for the duck to eat.