
Concept explainers
To define:
The term endosperm.
Introduction:
In
To determine:
Endosperm derived from which cell of the female gametophyte.
Introduction:
Endosperm is developed from the triploid nucleus of a flowering plant. It acts as a food storage part of the seed which provides nutrients to the developing embryo.
To compare:
The storage site of endosperm in
Introduction:
Endosperm is produced by the fusion of sperm cell which contains one nucleus with the large central cell which contains two nuclei. The fusion of single nucleus sperm cell with large central cell results in the development of endosperm.

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Chapter 45 Solutions
Biology
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- Choose a catecholamine neurotransmitter and describe/draw the components of the synapse important for its signaling including synthesis, packaging into vesicles, receptors, transporters/degradative enzymes. Describe 2 drugs that can act on this system.arrow_forwardThe following figure is from Caterina et al. The capsaicin receptor: a heat activated ion channel in the pain pathway. Nature, 1997. Black boxes indicate capsaicin, white circles indicate resinferatoxin. a) Which has a higher potency? b) Which is has a higher efficacy? c) What is the approximate Kd of capsaicin in uM? (you can round to the nearest power of 10)arrow_forwardWhat is the rate-limiting-step for serotonin synthesis?arrow_forward
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