Answer: control plot
Explanation:
Control plot refers to the plot that couldn’t receive the experimental treatment such as fertilizer and or variable being tested while another plot receive fertilizer can give proper yield. It is just because, fertilizer is the main source or substance that provides chemical elements that may necessary for corn plant growth and its development. There are two main types of fertilizers such as organic and inorganic, among them organic fertilizer usually contains different nutrients that broken down by different microorganism and then used by such plants to grow effectively.
The skeleton of an embryo is made up of cartilage and collagen
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Answer:
Feathers initially evolved in a role associated with sexual selection.
Explanation:
In species where only males had feathers, these feathers can be considered to have evolved into a role associated with sexual selection. This is because in these species, males used their feathers as a sexual attraction for females, in this case, females chose the males that had more attractive feathers to mate and generate new individuals for the species. An example of this can be seen in the peacock, where the tail with lush feathers is only present in males and is intended to sexually attract females.
