Answer:
Common descent is a theory that states that all organisms are descendants of a single common ancestor.
Explanation:
Common Descent:
- By definition, common descent signifies the common ancestry of a group of organisms.
- Common descent is an approach to explain the similarities between different organisms.
- The theory of common descent states that all organisms have descended from one common ancestor and therefore, possess some degree of similarity.
- Common descent has helped explain the genetic and structural similarities between two entirely different organisms such as reptiles and birds.
- For example, pentadactyl limbs i.e. limb with five fingers or digits is a highly conserved characteristics of all tetrapods. This indicates common descent with modification.
For study island it is A. science specifically involves observing, asking questions, and doing experiments on natural phenmona.
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There are two types of weight lifters: endurance weightlifters and strength weightlifters.
Endurance weightlifters use slow-twitch muscle fibers. These muscle fibers provide <span>consistent, steady energy that allows continuous use for extended periods of time.
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Strength weightlifters use fast-twitch muscle fibers.These muscle fibers <span>contract quickly and can provide bursts of efficient energy for powerful movements.</span> But, these muscle fibers need to be rested often because they fatigue quickly.
The history of giraffes had to had been a long necks
D. Ponds and lakes
Explanation:
Limnetic zone is the water area zone where light does not penetrate the bottom as the depth of the water is more towards the center whereas littoral zone is the zone near shore area which is shallow and where plants grow and sunlight penetrates all way in this area. Littoral zone surrounds the limnetic zone in the lake and ponds because the rest of the water bodies mentioned in the question have free flowing water.