Answer:
Capillary smooth muscle contraction.
Explanation:
Actually, the above question in incomplete as the full question contains these choices.
- Capillary smooth muscle contraction
- Valves in lymph vessel walls
- Skeletal muscle contraction
- Breathing
The answer for this question is capillary smooth muscle contraction because lymph flow in one direction.
Valve in lymph vessels walls pushed the lymph forward and stop it from back flow.
Muscles present surrounding the lymph vessels help in flow of lymph by their massaging effect.
Deep diaphragmatic breathing helps in the movement of lymph through blood stream and increases toxins elimination.
Answer:
Influenza (The Flu)
Explanation:
Influenza (the flu virus) is a real-life example of natural selection that is most evident during an annual time period when the influenza virus infection peaks. The repeated or cyclical nature of flu outbreaks is caused by the natural selection of the virus for traits that allow it to evade the immune system and replicate, a process that actually results in new distinct strains of influenza virus.
Hi there! Your answer is <em>photosynthesis! </em>Good luck on your science exam!
Answer:
The frozen ground does not allow roots for large trees to grow
Explanation: characteristic of *severe cold climate regions* *especially treeless artic regions* and high mountain tops. Plant life must adapt itself to a *short growing season(e.g,shrubs and low lying plants adapt themselves to short growing season)* of about 60 days and to a soil that remain frozen for most of the year. Most tundra regions are covered with bogs, marshes, ponds and a spongy mat of decayed vegetation, although high tundras may be covered with only lichens and grasses. Vegetation of dwarf woody plants, grasses, sedges and lichens may be quite profuse in tundra despite the thin soil and short growing season.
Therefore, large trees cannot allow roots for large trees to grow in frozen ground but short shrubs and low lying plants can,to an extent .
Eukaryotic cells use three major processes to transform the energy held in the chemical bonds of food molecules into more readily usable forms — often energy-rich carrier molecules. Adenosine 5'-triphosphate, or ATP, is the most abundant energy carrier molecule in cells.