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Pepsi [2]
1 year ago
12

Why are indices better than simple measurements for comparing fossil specimens?

Biology
1 answer:
damaskus [11]1 year ago
8 0

Answer:

Indices are used to study fossil specimens and compare them against each other. They are based on concept of ratio hence better than simple measurements when it comes to comparative analysis. They compensate for the problems caused by other variable factors like size or specimen.

For example, to estimate if an organism is long or round headed simple measurement of cranial length or breadth can be done and the result can be given according to the selected parameter. However some specimens will have longer breadth than length and some will have longer length than breadth. So, it is better to measure both the parameters and find out their ratio. Hence, cranial index is used which is given by: (Cranial breadth/Cranial length)*100.

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Calculate the rate of photosynthesis (mm/hr) for Elodea if when measuring net photosynthesis, the water level moved up 7mm from
ZanzabumX [31]

Answer:

With 6 we should multiply gross photosynthesis (as we were measuring gross photosynthesis for 10 min).

Explanation:

According to this question:-

Net photosynthesis- 3mm/20min- 1.5mm/10min

Cellular respiration- 1mm/15min- 0.66mm/10min

Gross photosynthesis = Net photosynthesis + Cellular respiration = 1.5+0.66 = 2.16 (mm/10min)

Rate of photosynthesis = (gross photosynthesis)6 = 2.16 *6 = 12.96 mm/hr

As we gage the photosynthesis rate in hr.

5 0
2 years ago
A fossil mold that reflects the shape and surface markings of an organism is created when _____.
Lady bird [3.3K]

Correct answer: D). The organism is buried in sediment and then dissolved by underground water

Mold is a copy of an organism, it is formed like the first layer of sediments harden and forms a mold. Then after that new layer of sediment fills and become hardens.

The fossil is left behind in sediment, which removes the remains of an organism from its surrounding material. The groundwater along with its mineral content dissolves the organic matter to form the fossil.


3 0
2 years ago
Read 2 more answers
Officially, insects are a class of invertebrates with a three-part body (head, thorax and abdomen), three pairs of jointed legs,
Tom [10]

Answer:

  • There is a diversity among beings some are very large, while others are microscopic in nature. However, we are always very curious about the classification of the insecticides in the ecological pyramid because there are termed to be the invertebrates having a proper body with all the segments i.e head, thorax, and abdomen well placed to form the structure of the living being.
  • As they are mostly characterized for there small size and very complicated form of morphology, while the insects are found to be living inside the soil and on the plant structures.

Explanation:

  • Insects are the one who plays the pivotal role in the decomposition of the living beings i.e both plants and animals inside a specific region. While, the insects have the basic feature to cover them selves with a protective layer of proteins,so, they can shield themselves from any degree of harm while living inside the environment.
8 0
1 year ago
brainscape: Restriction enzymes: A) act at the membrane to restrict the passage of certain molecules into the cell. B) are highl
PolarNik [594]

Answer:

C) are sequence-specific DNA endonucleases

B) degrade foreign DNA that enters a bacterium.

Explanation:

Restriction enzymes are the proteins that cut the DNA at a specific sequence.

<u>Restriction enzymes are also known as restriction endonuclease produced by bacteria that recognizes a specific sequence on DNA and split it by catalyzing the hydrolysis or addition of water molecule. </u>So, Restriction enzymes are sequence-specific DNA endonucleases.

The biological role of restriction enzymes is to restrict the entry of foreign DNA into the bacterium. <u>Restriction enzymes have the ability to restrict the number of bacteriophage strains that affect bacteria.</u>

Hence, the correct options are "C and B"

8 0
1 year ago
Explain how the muscles pectoralis major and serratus anterior show two different ways in which muscles are named.
expeople1 [14]
Muscles pectoralis, an enormous muscle that ventilates beginning from shoulder to breastbone. The serratus foremost is named for its connection deep down and its source and muscle filaments. The pectoralis major is named for its size and area in the body.
3 0
2 years ago
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