Match the microscope part with it's function.
Fine focus
A) Focus light onto the specimen
B) Control the amount of light reaching the specimen
C) Brings the specimen into general focus
D) Increases the detail of the image
D) Increases the detail of the image
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The evolution of _____ resulted in an increase in the levels of atmospheric oxygen
a. sexual reproduction b. aerobic respiration c. the noncyclic pathway of photosynthesis d. the cyclic pathway of photosynthesis
What is one mechanism through which increased density may cause infant mortality in mammals?
A) reduced social contact causes stress B) reduced seed bank causes a decrease of feed for infants C) increased stress increases infant size D) high stress environments may reduce lactation
________ muscle tissue is involuntary and has branching cells with striations
Fill in the blank(s) with correct word
At puberty, an adolescent female body changes in both structure and function of several organ systems, primarily under the influence of changing concentrations of estrogens and other steroid hormones
How can one hormone, such as estrogen, mediate so many effects? A) Estrogen is produced in very large concentration by nearly every tissue of the body. B) Each cell responds in the same way when steroids bind to the cell surface. C) Estrogen is kept away from the surface of any cells not able to bind it at the surface. D) Estrogen binds to specific receptors inside many kinds of cells, each with different responses.