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Llana [10]
3 years ago
13

The diagram below shows the layers in a rock having a brachiopod: A rock column labeled Rock is shown. The column has three laye

rs. The bottommost layer of the rock has two identical organisms marked as, Brachiopod, in the key and one shaded circle, the middle layer has a two squares, the top layer has one star shape. In the key the shaded circle is marked as X, the square is marked as Y and the star is marked as Z Which statement about the rock fossils is true?
Biology
2 answers:
Elena-2011 [213]3 years ago
6 0

I know I'm late but I htought I'd give the answer for anyone in the future. The answer is  "Organism X existed for a short period of time." I got it right on a test and I saw that there was no right answer here so I thought I'd help out Hope it helps!

mars1129 [50]3 years ago
4 0
The square marked as y and the star is marked Z
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Question 5
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The environmental effects of an individual or group in terms of resources used and waste produced is an individual or group's ecological footprint (option A).

<h3>What is ecological footprint?</h3>

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Living organisms make use of resources in the environment and these can either leave negative or positive effect on the environment that will affect sustainability.

Therefore, it can be said that the environmental effects of an individual or group in terms of resources used and waste produced is an individual or group's ecological footprint.

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8 0
2 years ago
Polydactyly is an autosomal dominant trait in which affected individuals have more than five fingers and/or toes. If a pedigree
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Answer:

Reduced penetrance or incomplete penetrance

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It can be complete where there is expression of the gene in a population having it.

Whereas, in reduced penetrance is where the mutation is not expressed in every individual in the population having it.

For instance polydactyly exhibits reduced penetrance since the parents had the mutation it was not expressed it came to be expressed on their pedigree.

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