Biology Questions
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A researcher wants to know if gene flow is contributing to evolution of drought tolerance of pitcher plants in a specific bog. To detect if gene flow is naturally occurring in the bog, she could
In short-horned cattle, RR causes red coat color, rr causes white coat color, and Rr causes roan coat color. Which of these populations is in Hardy-Weinberg equilibrium?
An opossum population has a gene with two alleles, A1 and A2. If 80% of the gametes produced in the population contain the A1 allele (the A1 allele frequency is 0.8) and the population is in Hardy-Weinberg Equilibrium, what proportion of the offspring flies will carry both A1 and A2?
If you then sample a second opossum population that has the same starting allele frequency, and find that the proportion of A1 homozygotes (A1A1 individuals) is 90%, you would likely say that
The diagram shows the taxonomic relationships between some mammals.Suggest two types of evidence that could have been used to construct this diagram.
The biologists analysed the amino acid sequences of the blood protein samples from these hummingbirds.Explain how these sequences could provide evidence as to whether the crimson topaz and the fiery topaz are different species.
The variety of colours displayed by catfish is important in courtship. Give tways in which courtship increases the probability of successful mating.
Evolutionary relationships between different primates can be found by comparing their proteins and DNA.All primates produce a species-specific type of haemoglobin. An antibody against human haemoglobin could be used to compare the evolutionary relationships between different primates. Describe and explain how
Scientists investigated the effect of total body length on the selection of a mate in oneAustralian species of seahorse. The scientists used head length as a measure of total bodylength. Use the diagram to suggest why the scientists measured head length rather thantotal body length.
The biologists measured the temperatures at which the samples of hybrid DNA separated into single strands. Explain why these temperatures could be used to find the percentage of DNA hybridisation.
Cranes are large birds. One of the earliest methods of classifying cranes was based on the calls they make during the breeding season. Explain why biologists could use calls to investigate relationships between different species of crane.
Describe how Figure 4 could be used to predict the percentage of unsaturated fatty acids produced by female garter snakes of body length greater than 75 cm.
Suggest sources of evidence which scientists may have used to classify cheetahs and leopards in different genera.
Comparing the base sequence of genes provides more evolutionary information than comparing the structure of proteins. Explain why.
Classification is the grouping of similar organisms. State one advantage of classification
The scientists concluded that male snakes showed more courtship behaviour towards long female snakes and to lipids from the skins of long females. Explain one other conclusion that can be made from the data
Scientists can use protein structure to investigate the evolutionary relationships between different species. Explain why.
Comparing the base sequence of a gene provides more information than comparing the amino acid sequence for which the gene codes. Explain why.
A student who looked at these results concluded that animals B and C are more closely related to each other than to any of the other animals.Suggest one reason why this might not be a valid conclusion.
This system of classification is described as hierarchical. Explain what is meant by a hierarchical classification