Biology, 21.07.2019 01:00 berniceallonce22

An insecticide is a chemical that can rid a plant of insects that cause damage to the plant. if the same insecticide is used for many years, it is likely that it will no longer rid plants of insects. which statement best explains why insects are no longer harmed by an insecticide that has been used on the same plants for many years? a. over time, plants sprayed with an insecticide develop a resistance to it, which transfers to the insects when the insects eat the plants. b. some insects are born with an ability to avoid harm from an insecticide, and they pass this ability to their offspring when they mate and reproduce. c. some insects are born with an ability to avoid harm from an insecticide, and they pass this ability to other insects by coming into contact with them. d. over time, plants sprayed with an insecticide develop a resistance to it, which transfers to the insects when the insects lay their eggs on the plants.

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Answer from: amandasantiago2001

I believe that the correct answer is B; some insects are born with an ability to avoid harm from an insecticide, and they pass this ability to avoid harm from an insecticide, and they pass this ability to their offspring when they mate and reproduce. Insects with this ability have an advantage over insects without this ability; over many generations, more insects with this ability will survive to reproduce, and more insects without this ability will die before they can reproduce. In the long run most of the insects in the population will have the ability to avoid harm from the insecticide.

Answer from: Quest

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the water molecules are transferred from the roots to the stem or top parts of the tall tree because of important properties of water which are adhesion, cohesion and capillary action. cohesion is the property of water molecules keeps water molecules in a combined state by sharing of bonds between them at the atomic level. adhesion allows the interaction of water molecules with other substances or substrate. adhesion will cause the attachment of water molecules to the wall of the vessel (xylem) of the plant. capillary action occurs when the adhesive force to the vessel wall is stronger than the cohesive force between water molecules. capillary action mimics the transfer of water from a tube or pipe. in this way water utilizes its property to transfer water from down to top level of the plant.

Answer from: Quest

If these are the missing choices: a. to determine skin temperature, place the back of your hand against the patient's skin.b. determine body temperature by touching the patient's hands and feet.c. skin temperature will tell you very little about this patient's condition or well-being.d. the patient's skin temperature and color will likely be warm and red.my answer is: a. to determine skin temperature, place the back of your hand against the patient's skin. using the back of the hand to check for temperature rather than the palm is more effective because the back of the hand has more nerves that can feel and transmit the temperature than the palm.

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An insecticide is a chemical that can rid a plant of insects that cause damage to the plant. if the...