In plant breeding, what is removed from the plant to prevent natural pollination?
a. anther sac c. style
b. petals d. stigma
A
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In a cell, the nucleus is surrounded by the ____________________
Fill in the blank(s) with the appropriate word(s).
Which statement is false as regards hydroelectric power?
a) Hydroelectric power reduces overall greenhouse emissions. b) Initial costs of construction are high, but operating costs are low. c) Hydroelectric plants may obstruct fish and wildlife migration. d) Mechanical energy is the main product of hydroelectric plants.
In an air-conditioning system using a TX valve on the evaporator, if the head pressure increases 20 psig, the suction pressure will ______________________________.
Fill in the blank(s) with the appropriate word(s).
Battery voltage is quickly checked with a(n) ____.
A. ohmmeter B. ammeter C. voltmeter D. thermometer