When the immune system is activated by a normally harmless antigen, this is called
a. an allergy.
b. an innate response.
c. a complement response.
d. cytotoxic cell response.
a. an allergy.
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Random distribution of individuals in a population occurs when resource availability is ____ and individuals ____ one
another. a. scarce; attract b. clumped; neither attract nor avoid c. random; avoid d. uniform; neither attract nor avoid e. scarce; avoid
Which type of bond represents a weak chemical bond?
a) nonpolar covalent bond b) polar covalent bond c) hydrogen bond d) ionic bond
Dandelions develop seeds by apomixis. What benefits does this strategy provide over vegetative or sexual reproduction?
A. Apomixis provides the benefits of seed dispersal, while maintaining a genome adapted to a given climate. B. Apomixis is beneficial in sheltered areas where wind pollination would be difficult. C. Apomixis is beneficial for plants that attract a diverse mix of bees and other pollinators. D. Apomixis makes the dandelions more resistant to herbicides.
What is meant by the statement "science is measurement"?
What will be an ideal response?