N an experiment, suppose that the wings of fruit flies were clipped short for fifty generations. The fifty-first generation emerged with normal-length wings. This observation would tend to disprove the idea that evolution is based on
a. inheritance of natural variations
b. inheritance of acquired characteristics
c. natural selection
d. survival of the fittest
Inheritance of acquired characteristics. Thus, option "B" is correct.
<h3 /><h3>What is inheritance of acquired characteristics?</h3>
For fifty generations wings of fruit flies were clipped. Hence they acquired this trait in their lifetime and not genetically. If acquired characteristics were capable of passing on to next generation, 50 generations would have been enough to inculcate this clipped wing trait in fruit flies. Despite it, the fifty-first generation did not have clipped wings.
Hence evolution can not occur without genetic variation. A character simply acquired in a lifetime does not create a difference in germ cells and hence is not enough to be passed on to next generation or cause evolution
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Microorganisms that infect the middle ear cavity most frequently come from the pharynx.
<h3>
What is pharynx?</h3>
- A hollow tube called the pharynx extends from the back of the nose down the neck and finishes at the top of the trachea and esophagus.
- The nasopharynx, oropharynx, and hypopharynx are the three components of the pharynx.
- The pharynx, sometimes known as the throat, is a component of the digestive and respiratory systems.
- It transports food, liquid, and air from the mouth and nose downward.
- Common infections like tonsillitis and a sore throat can spread to the pharynx.
- The throat is a muscular tube that resembles a ring and serves as the conduit for liquids, food, and air.
- It connects the mouth and nose to the breathing passages and the esophagus and is situated behind the nose and mouth.
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Answer:
C. Organism living in the fallen trees lose shelter.
Explanation:
talking about the effects of storm winds falling trees, it creates more light to reach shorter plant which will help the plants to do photosynthesis well, which will even facilitate their fast growth; that's positive.
Fallen trees becoming food for decomposers can also be positive cause this will help the soil or earth of that forest have fertility
New Clearing attracting animals such as man can lead to extinction of forest which to conservators they feel like no-no-no-no that's they'd see it as a negative consequence of the wind storm effect, yes this can lead to de-sheltering of organisms inhabiting that niche(trees)
Answer: 2. Precipitation
Explanation:
Aerobic cellular respiration requores oxygen. Photosynthesis does, as well.
Answer:
Snake venom involves enzymes, proteins and substances with a cytotoxic, neurotoxic effect and coagulants.
Explanation:
Snake venom is very deadly because of the enzymes it contains. For example, Snake venom hinders cholinesterase which causes loss of muscle control.
