Answer:
The correct option is <em><u>A. Over time, due to evolution by means of natural selection, resistant weeds survived, reproduced, and passed on their herbicide resistant genes. </u></em>
Explanation:
Herbicides can be described as substances which are used to kill unwanted plants such as the weeds. Nowadays, selective herbicides are produces which are effective in killing the weed species and do not harm the crop plants.
But over time, the weeds get resistant to the herbicide. As the theory of natural selection says, 'survival of the fittest', the herbicide which are resistant are better adapted to live hence, they pass their genes to the offsprings. This results in the production of more herbicide resistant weeds.
To keep track of water levels and to help predict possible floods.
Answer:
The steroid hormones cortisol and corticosterone are released by the Adrenals in response to the hormone ACTH from the Hypothalamus.
Lipids are organic compound that are insoluble in water.
Lipids are derive from and give eg of lipids?
Lipids are derivative of fatty acids the example of lipids are oils, wax and steroids.
Role of lipids are:
1)They fuctions as store house of energy.
2) They are important signalling molecules
3) They serve as structural components of cell membranes.
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