The barbed (fast growing) end of actin filaments is located in muscle
a. at the AI junction.
b. near the M line of a contracted sarcomere
c. at the inner margin of the AI zone
d. at the Z disc
e. none of the above
Ans: d. at the Z disc
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Select the pairs of organism characteristics that are homologous structures. Check all that apply.
_____ cactus spines; tree leaves _____ human hand bones; whale fin bones _____ bat wing; butterfly wing _____ octopus eye; mouse eye
Which of the following lists the stages of embryonic development in the correct order
following fertilization?
a. zygote, morula, blastula, gastrula, embryo b. morula, blastula, gastrula, zygote, embryo c. gastrula, blastula, morula, embryo, zygote d. embryo, blastula, gastrula, morula, zygote
Most carbohydrates, lipids, and proteins are digested, and most nutrients and water are absorbed in the ________
a. small intestine b. stomach c. large intestine d. esophagus
When an infected person is in the incubation period, that person cannot transmit the pathogen to others.
Answer the following statement true (T) or false (F)