Choose the true statements about the initiation of limb development in tetrapods.
_____ Forelimbs in birds and humans are analogous structures.
_____ The development of homologous limbs in different species involves the activation of all the same genes.
_____ Like Brachyury, Tbx5 has a T-box domain that codes for a transcription factor.
_____ Tbx5 encoded protein turns on genes that initiate limb development.
_____ Forelimbs in birds and humans are analogous structures.
_____ The development of homologous limbs in different species involves the activation of all the same genes.
__X__ Like Brachyury, Tbx5 has a T-box domain that codes for a transcription factor.
__X__ Tbx5 encoded protein turns on genes that initiate limb development.
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Which of the treatments listed below would be MOST effective for a patient with a genetic defect that causes severe combined immunodeficiency (SCID)?
A) intravenous antibiotics B) bone marrow transplant C) multiple immunizations D) repeated doses of antisera
While hiking through the woods on your day off, you find a dead tree that is nevertheless covered in leaves. Closer examination reveals that the leaves belong to a vine that has attached itself to the dead tree’s branches and has no contact with the soil below. What type of roots does this vine possess?
a. tap b. fibrous c. epiphytic d. adventitious
Compare and contrast how invertebrates with a hydrostatic skeleton (earthworm) and an exoskeleton (fly) move
What will be an ideal response?
During swallowing, the _____ covers the entrance to the larynx. This structure is identified and labeled as letter _____
in the above diagram.
a. epiglottis; E b. pharynx; B c. glottis; C d. epiglottis; C e. trachea; E