In a hybrid zone, can occur if the reproductive barrier between two species is weak, as seen among cichlids in the murky waters of modern lake victoria. a. reinforcement b. fusion c. allopatric speciation d. reproductive isolation

Fan egg cell containing the (n+1) number of chromosomes combines with a sperm cell containing the (n) number of chromosomes, what is the result of this union? a) all future somatic cells of the organism will contain the (2n + 1) number of chromosomes. b) all future somatic cells of the organism will contain the (2n - 1) number of chromosomes. c) only certain somatic cells of the organism will contain the (2n + 1) number of chromosomes. d) all future somatic cells of the organism will contain the normal diploid number of chromosomes.

One important development during the 3rd trimester that will insulate the infant against changes in temperature is a. the deposition of fat under the skin b. the closing of the septum between c. the atria of the heart d. the beginnings of lung functioning e. the beginnings of light and sound sensing

We all have different forms of genes from our parent(s).what are these different forms called? a.alleles b.characters c.dna d.resources