Answer: Leaves in a cactus are modified into spines to reduce loss of water from leaves by transpiration. Then the plant makes from the process of photosynthesis which is performed by the stem.
Explanation:
Genes are DNA or RNA, they act as instructions to make molecules called proteins! They are found in chromosomes and there main objective is to carry out information that determines your characteristic traits that are inherited from your parents!
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Answer: Pigeon and duck.
Explanation:
From that side of the tree, you can see that the pigeon and the duck are closest together in the tree than the other organisms in the other options.
Waste water
oil pollution
river dumping
marine dumping