Compare and contrast how invertebrates with a hydrostatic skeleton (earthworm) and an exoskeleton (fly) move
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An earthworm's coelom is divided into many fluid-filled chambers, one per segment. Movement occurs when muscles exert force against these chambers. Two sets of muscles squeeze the chambers to alter the shape of body segments.
A fly has muscles attached to its exoskeleton. For example, muscles attached to the cuticle of a fly's thorax alter the shape of the thorax, causing the attached wings to flap up and down producing movement.
The two types of skeletal systems are similar in that they share a skeleton in which muscles exert force, producing movement but they differ in terms of design and composition. Worm's muscles exert force on fluid filled chambers, which creates movement while fly's exert force on their outer exoskeleton which is attached to appendages (wings), which then move.
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Draw and label a pedigree of Noah and his parents based on the theory that he was affected with an autosomal recessive genetic disorder. Explain your drawing and briefly describe the disorder that Noah might have had
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Erythropoietin release is controlled by ____
a. blood doping b. the amount of oxygen in the blood c. positive feed back d. factors from the anterior pituitary e. plasma iron concentration
Bacteriophages decrease food safety
____________________ Indicate whether the statement is true or false.
A DNA microarray (also called a DNA chip) can be used to ________
A) isolate genes from eukaryotic cell nuclei B) scan a population of nucleic acids for abundance and mutations C) assay protein output from a genomic database D) mutate genes of interest E) trap genes that are both active and inactive