Three species of lizard, labeled a, b, and c, are being studied using molecular analysis by two research colleagues in different laboratories. the mitochondrial dna of lizards a and b are compared and are found to differ by 0.1%. the ribosomal rna of lizards b and c are found to differ by 0.02%. they compare their findings and conclude that lizard b is more closely related to c than to a. what is the flaw in their reasoning, and how can their analysis be improved?
a. they applied different mathematical formulas for their computations. they should recalculate using the same formulas.
b. they compared different molecules which have different mutation rates. they should compare same molecule in the lizards.
c. they only made one measurement each. they should repeat their measurements to reduce the uncertainty in their results.
d. they used different equipment for analyzing the molecules since they work in different labs. they should work in the same lab.

B. They compared different molecules which have different mutation rates. They should compare same molecule in the lizards.

Explanation:

The researchers shown in the question above wish to discover the genetic relationship of three lizards based on analyzes of different molecules. The researchers evaluated the difference between DNA in lizards A and B and evaluated the difference between RNA molecules between lizards B and C, so it is not possible to detect a genetic relationship between lizards. The correct thing would be for researchers to investigate only the DNA of all lizards, or just the RNA of all lizards.

answer: angiosperms

dicots

angiosperms are highly evolved plants, they produce seeds which are enclosed within in a carple. these are the largest group of plants on earth. they include trees, shrubs, herbs and small flowering plants. angiosperms exhibit a flowering stage in their life cycle. the flower serves the function of reproduction and fruit formation in majority of angiosperms. dicot is the term used to describe flowering plants that have two seed leaves. dicots are plants which develop seeds which split into two parts called cotyledons. each cotyledon contains one embryo.

here, a small purple flower development indicates that the plant belongs to angiosperms and having two embryonic leaves indicates it belongs to dicots.  

b a mature ovary of a plant.