Ovules develop within the ovary, which is located in the swollen lower portion of which floral organ?
A. anther
B. stamen
C. filament
D. stigma
E. pistil
E. pistil
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Explain how the resulting phenotypic ratios from Mendel's dihybrid cross assisted him in framing his Second Law
What will be an ideal response?
The secretions of endocrine glands ____
a. only affect their own tissue b. provide feedback by paracrine action c. reach their target tissue via the ECF d. reach their target tissues via the circulatory system e. are only active in the nervous system
The viruses that can infect bacterial cells are
A. cold viruses. B. HIV virus strains. C. influenza viruses. D. bacteriophages.
If an isotope has a half-life of 4 million years and a fossil is 16 million years old, how much of the original isotope will be found in the fossil?
A) one-half of the original amount B) one-quarter of the original amount C) one-eighth of the original amount D) one-sixteenth of the original amount