Trace the flow of blood in mammals starting from the left ventricle
a. systemic circuit, right atrium, right ventricle, pulmonary circuit, left atrium
b. right ventricle, right atrium, pulmonary circuit, left atrium, systemic circuit
c. pulmonary circuit, right atrium, right ventricle, systemic circuit, left atrium
d. left atrium, pulmonary circuit, right ventricle, right atrium, systemic circuit
A
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Which of the following is/are among the changes sperm may undergo once they enter the female reproductive tract? (Select all correct choices.)
A. changes in the fluidity of the plasma membrane B. loss of surface membrane proteins C. changes in membrane potential D. increased motility E. release of enzymes from the acrosome
Hox genes are a family of transcription factors that regulate development throughout the animal kingdom. Studies of Hox genes in mice and Drosophila showed that many Hox genes are conserved between both species, and several Hox genes duplicated into new genes with novel functions within mice. Some Hox genes have even lost all function. Hox genes provide an example of which of the following? Check all that apply.
_____ orthologs _____ paralogs _____ heterologues _____ pseudogenes Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about homology? Consider Possibilities · Consider the different answer options. Which can you rule out? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
In a hypothetical land ecosystem, plants- the
primary producers- capture 1000 kilocalories of sunlight energy per square meter per year. Approximately, how many kilocalories of the plant’s energy will be harvested by the third trophic level?
a. 1 b. 10 c. 100 d. 1000 e. impossible to calculate
What is dosage compensation with respect to the sex chromosomes, and how is this accomplished in humans? What will be an ideal response?