Biology, 12.09.2019 22:20 brandonkelly104

Explain how ordered and unordered tetrad analysis can map the positions of genes and (for ordered tetrads)centromeres.

Answers: 1

Show answers

Answers

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.

Answer from: Quest

i think this picture will you.

The meselson-stahl experiment demonstrated that dna replication is semi conservative in the figure s

Answer from: Quest

the oldest known insects are believed to live around 400 millions ago as suggested by the fossil records. some plants having woody stems also evolved during this time.

after the evolution of insects the first four legged species or the tetrapods evolved in shallow freshwater habitats from the intermediate species approximately 397 million years ago. the tetrapods went on conquering the land giving rise to amphibians, reptiles, mammals and birds.

the major split in tetrapods first occurred 340 million years ago branching off from amphibians.

363 million years ago when the carboniferous period began the insects started roaming on land and taking flights, following which the four limbed tetrapods adapted in the terrestrial habitat.

Answer from: Quest

i'd have to say the answer is probable the second option "the geosphere interacting with the atmosphere"

Another question on Biology

Biology, 21.06.2019 20:30

How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?

Answers: 2

Answer

Biology, 22.06.2019 01:30

What occurs to the cell during mitosis

Answers: 2

Answer

Biology, 22.06.2019 04:30

Pls quickly! which of the following is true about the behavior of an organism? a. the behavior of an organism is influenced by both its heredity and it’s environment. b. the behavior of an organism is influenced only by the treats it inherits from its parents. c. the behavior of an organism is influenced only by the environment in which it lives in. d. the behavior of an organism is not influenced by either it’s heredity or its environment.

Answers: 2

Answer

Biology, 22.06.2019 19:00

1. in what ways have non-native species been beneficial? 2. what are some of the hypotheses for the collapse of honeybee colonies? 3. distinguish between regional and functional extinction. 4. why is it difficult to measure background extinction rates? 5. what three factors are most important in causing extinction rates to climb?

Answers: 2

Answer

You know the right answer?

Explain how ordered and unordered tetrad analysis can map the positions of genes and (for ordered te...

Questions