Biology, 10.02.2021 20:50 mauifrifer3986

In areas of heavy use of the insecticide DDT, fly populations may show marked resistance to the
DDT over a period of time. Someone who accepts
the evolutionary theory of Lamarck would most
likely explain this observation using the concept of
A natural selection
B. inheritance of acquired characteristics
C. overproduction of a species
D.
a change in the gene frequencies

Answers: 3

Show answers

Answers

Answer from: Quest

answer: accepted answer: aquatic animals use the oxygen dissolved in water to carry out respiration. since the amount of dissolved oxygen in water is low as compared to the amount of oxygen in the air, therefore the rate of breathing in aquatic animals is much faster than it is in terrestrial animals.

explanation:

Answer from: Quest

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.

Answer from: Quest

The short-term effect of tar on the body is increased blood pressure.

Answer from: Quest

answer: carbon 14 can only be used to determine the age of the organisms that were once living, and igneous rocks are non living.

explanation:

carbon 14 dating is used to determine the age of the sample by estimating the amount of carbon 14 present in the sample and then comparing it with a reference standard.carbon 14 is a isotope of carbon which is radioactive and unstable. carbon 14 is assimilated by all plants and animals throughout their life from carbon dioxide. however, one the organisms die they stop this assimilation and the carbon 14 content starts to decrease.by knowing how much of carbon 14 is left in an organism after his death, one can estimate the age of the organism. the materials whose age can be estimated by carbon 14 method are the organic compounds. however, some inorganic compounds such as aragonite shell can also be dated.however, if we consider the igneous rocks it is a non living component which never accumulated carbon 14 in it and thus, we cannot use carbon 14 dating method to estimate its age.

Another question on Biology

Biology, 21.06.2019 23:30

Compare and contrast region e in the illustration above with region d. describe the physical characteristics of each region.

Answers: 1

Answer

Biology, 22.06.2019 08:00

Acell goes through cellular respiration and produces atp which it then uses to move a molecule across the cell membrane. how does the energy in the original glucose molecule change during this process? (2 points)

Answers: 1

Answer

Biology, 22.06.2019 08:10

What’s the student’s scientific question

Answers: 2

Answer

Biology, 22.06.2019 09:00

Group control group #1 experimental group yes yes yes control group #2 no new drug orange juice bed rest no yes no yes ves which of the following is the best explanation of why a second control group was included in this experiment? o a. to provide the volunteers in the study with something to drink o b. to prove that the common cold cannot be cured c. to confuse anyone who is trying to steal their new drug and sell it as their own invention o d. to researchers conclude that results are related to the new drug and not to the orange juice submit e previous

Answers: 3

Answer

You know the right answer?

In areas of heavy use of the insecticide DDT, fly populations may show marked resistance to the

Questions

Biology, 05.10.2020 14:01

A fox preys upon a rabbit, and the rabbit feeds on grass. The grass grows through the process of photosynthesis, so it requires sunlight, water, and c...