Biology, 28.08.2019 13:50 grace783

Idon't have much time! answer quickly! 2 questions:
1. which system of grouping is in figure 18-2, a or b provides information about the evolution of the three animals
2. according to the cladogram in figure 18-2, what two characteristics do crabs and barnacles share that limpets do not?
you in advance

Idon't have much time! answer quickly! 2 questions: 1. which system of grouping is in figu

Answers: 2

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Answer from: bryanmcmillianjr

1. It is the left side being since the groupings contain sealike animals 2.crabs and barnacles snap limits don't

Answer from: Shamasen1

The correct answer is-

1) Cladogram

2) Molted external skeleton and segmentation.

A cladogram can be described as a diagrammatic representation in a branching treelike form, which is used to depict phylogenetic relationships among different species.

For every divergence point in a cladogram, the two branching lines show descendance, which indicates divergence of species from a common ancestor. Thus, it is a system of grouping of various organisms.

In the given cladogram, the two characteristics that are shared by crabs and barnacles but not by limpets are Molted external skeleton and segmentation.

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

Go into your kitchen and get some water or coolaid and warm up at hot dog

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Idon't have much time! answer quickly! 2 questions:
1. which system of grouping is in figu...

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