Minerals from the topsoil leach down into the subsoil. Volcanic activity heats the rock fragments in the subsoil and releases minerals. Groundwater flows through the subsoil and deposits minerals. The bedrock below the subsoil is broken down into smaller particles.
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.
Answer: just look it up on goegle
Explanation:
Answer:
B The number of cactus plants would increase.
Explanation:
Answer;
Respiration in cells, photosynthesis, activating a cod pack- absorb energy
Producing electric current, burning a candle, baking bread- release energy
Explanation;
-The chemical reactions that absorb energy are called endothermic reactions. These reactions absorb more energy than they release. When endothermic reactions absorb energy, a temperature drop is measured during the reaction.
The chemical reactions that release energy to the surroundings are called exothermic reactions.Endothermic reactions are characterized by positive heat flow (into the reaction) and an increase in enthalpy.