Answer:
(a) Allow movement in only one plane/direction (that is extension or flexion)
(b) The skeletal system also produces blood cells in their bone marrow
Its called adaption when an animal changes itself to be able to survive
Answer:
C
Explanation:
A rainforest is humid, therefore, water uptake would likely not be an issue. However, rainforests have a huge number of trees, often these are very tall. These large trees might block out the sun from the smaller plants nearer the ground. This means they would struggle to properly photosynthesise, as they wouldn't have the necessary light energy.
Therefore, as a survival adaptation, it is likely that an allele that produced broader leaves for photosynthesis would be selected for in this population. Broader leaves would give a larger surface area for the plant to absorb light energy to perform photosynthesis.
Due to the increasing temperature in ocean it is more advantageous for start fishes to reproduce asexually because they can regenerate via a process called fragmentation.
In fragmentation, a part of arm or a part of disc is separated from the parent body and grows into a complete new organism; an individual star fish.
Moreover, regeneration is the ability of an organism to renew, or re-grow any part of the body, makes it resilient to environmental fluctuations.
Answer:
Option D, None of the above
Explanation:
Latent heat of fusion is the amount of energy required to change the phase of metal from solid to liquid. While Latent heat of vaporization is the amount of energy required to change the phase of metal from liquid to gas.
Now, in the question the unknown metal melts from solid to liquid when 
of energy is supplied.
None of the metal in the given set of options has "
metal Latent heat of fusion" equal to or near to
Thus, option D is correct.
