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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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Which organisms develop gills from pharyngeal arches and later develop lungs to breathe on land? Frog Scallop Salamander Scorpio
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Answer:

frog

Explanation:

frogs live their first part of their lives in water so they need gills but after metamorphosis they live on land so they need lungs.

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Of the following experimental results, which is the best evidence that photosynthesis is more efficient at certain wavelengths o
GarryVolchara [31]

Answer:

The correct answer will be option-C

Explanation:

The plant absorbs the sunlight to perform photosynthesis which helps produce the sugar molecule used by the plants.

The plants absorb maximum sunlight at two wavelengths that are red and blue wavelength by chlorophyll and other pigments. The efficiency of photosynthesis is also measured maximum at these two active wavelengths called action spectrum.

In the given question, since the efficiency of photosynthesis has been discussed which could be measured with the production of oxygen and consumption of carbon dioxide. The experiment performed by the Engelmann showed that aerobic bacteria got concentrated in the blue and red wavelengths as the output of the photosynthesis were observed maximum.

Thus, the selected option is the correct answer.

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3 years ago
How could the notion of maximum parsimony lead to an error in establishing an evolutionary relationship
Grace [21]

Answer:

The notion of maximum parsimony does not consider the entire evolutionary history, being able to suppress important evolutionary points that would cause errors in the evolutionary relationship of a species.

Explanation:

Maximum parsimony is a criterion for optimizing phylogenetic trees. This is because through this criterion an analysis is made of all possible phylogenetic trees of a species, observing which one is smaller and offers simpler and summary information. On the one hand, the study of the smallest phylogenetic tree can be faster and more understandable, since its information is basic and direct. However, maximum parsimony can lead to errors in the establishment of an evolutionary relationship of a species, because it suppresses the entire history of evolution of that species, being able to suppress really important points in one of the clades, which would result in an incorrect evolutionary conclusion.

6 0
3 years ago
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yarga [219]

mnactive  \: transport.

Explanation:

Thanks!!!!

7 0
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stiks02 [169]

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Thus, the answer is social.

3 0
3 years ago
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