Stamens and carpels are, in fact, modified sporangia-bearing leaves.
Answer the following statement true (T) or false (F)
True
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Over the past century, the Earth's climate has ________ by an estimated 0.74°C
Fill in the blank(s) with correct word
Potassium ions are important in the resting membrane potential and the action potential of the nerve and to the contraction of muscle cells. The concentration gradient of potassium ions is critical to both
An excess of potassium outside a neuron or muscle cell would negate the concentration gradient. What would happen if the heart were injected with massive amounts of potassium? Explain your answer.
Given its mode of reproduction and internal structures, which of the following should be expected to occur in Giardia at some stage of its life cycle?
A) separation (segregation) of daughter chromosomes B) crossing over C) meiosis
The building block molecule (monomer) of fats and oils is
A. amino acid B. simple sugar C. glycerol and fatty acids D. nucleotide