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Q. Bryophytes and fern allies were most prevalent during early plant evolution; however, many of these plants have been replaced by vascular plants. These "lower" plants possess flagellated sperm that have to swim through an aqueous medium to reach and fertilize eggs. From this information, in what kinds of habitat will you expect these plants to happen when they were abundant? On the other hand, vascular plants became dominant during the invasion of what type of habitat? What structures allowed them to infiltrate this new environment?
In a population with two alleles, A and a, frequency of A is 0.2. Organisms that is homozygous for A die before reaching sexual maturity. In five generations, what will be the frequency of individuals aa with genotypes.
When a tropical moth is touched on the thorax it lifts its forewings up abruptly, exposing its brightly coloured hind-wings. What causes the moth to behave this way? What significance can we attach to the fact that the verbal ability scores of ado..
What is the possibility that they will have a daughter that has the disease. Vitamin-D resistant rickets is a sex-linked dominant trait.
Drag the labels onto the graph to indicate which presynaptic neuron produced each change in the axon hillock's membrane potential. Assume that the same number of ligand-gated ion channels opens at each synapse.
What is the possibility that this child will have red-green color blindness? Figure the cross.
The Neurospora cross was made between a strain that carried mating type A and the mutant allele arg-1(arg) and another strain the carried mating-type a and the wild type arg-1 (+)gene
Monarch butterfly populations are found east and west of Rocky Mountains. How can DNA fingerprinting technology be used to establish that they constitute one breeding population or two separate breeding populations.
In maize, a dominant allele (A) is essential for seed color as opposed to colorless (a). Another gene has a recessive allele (w) which results in waxy starch, as opposed to normal starch (W).
In mid afternoon, they are on it's under surface, each caterpillar hanging by a few legs. Offer a hypothesis to explain this behaviour. How would you test it.
Describe how each functions, and outline how the organs work together to carry out the role of an organ system. What quantity of the purple flowered, short stem plants in the F2 are expected to be pure breeding. Illustrate the work.
How do these duplications arise and what do they propose in terms of mechanisms of transposition. Could you help to understand FEV1/FVC and how the expected percentage of this figure relates to respiratory problems.
Utilize your imagination to describe two ways in which disturbance of the sort just described may affect the animals that live on the panels and amount of free space available.
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