Materials move in and out of the nucleus via endocytosis and exocytosis.
Answer the following statement true (T) or false (F)
False
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In regions where malaria is prevalent, individuals who are _____ for the S (sickling) allele have a selective advantage
A. heterozygous for the S (sickling) allele B. homozygous for the S (sickling) allele C. heterozygous for the A (nonmutant) allele D. homozygous for the A (nonmutant) allele
Facilitated diffusion is limited by
A. the substrate concentration. B. the size of the cell. C. carrier proteins in the membrane. D. osmotic pressure. E. the size of the pores in the membrane.
The structure where fertilization takes place is the ____
a. ovary b. oviduct c. oviduct d. cervix e. uterus
In addition to disruptive selection on a fitness trait, such as food gathering, sympatric speciation requires:
a. gene flow. c. geographic isolation. b. assortative mating. d. clinal variation.