Distinguish between the structure of a duplicated chromosome before mitosis and the chromosome produced by separation of two chromatids during mitosis.
What will be an ideal response?
Prior to mitosis, each chromosome consists of two chromatids. During anaphase the chromatids separate, so each chromosome now consists of a single chromatid. (Replication of this single-chromatid chromosome occurs during interphase to give rise to two chromatids).
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Recall that angiosperms are, by far, the most diverse group of plants. Which plant group is the second most diverse, having approximately 23,000 living species?
A. the lycophytes B. the ferns and horsetails C. the bryophytes D. the gymnosperms
A flower's _____ has one or more ovaries in which eggs develop, fertilization occurs, and seeds mature
a. pollen sac c. receptacle b. carpel d. sepal
When an enzyme linked receptor is activated, a conformational change activates the extracellular
kinases. __________________ Indicate whether the statement is true or false.
In all types of chemoreceptors, receptor cells develop receptor potentials in response to ________
A) changes in the movement of the surrounding molecules B) the electrical properties of the surrounding cells C) chemicals dissolved in a fluid such as blood or saliva D) the addition of positively charged proteins