18. Which of these statements about particulate matter less than 2.5 microns in diameter is true?
O A. They're the size of a human hair
B. They can cause heart and lung disease.
C. They're less of a threat than particulate matter that's 10 microns in diameter
D. They're produced from nitrogen gas (N2).

In sweet pea, gene c is responsible for color production and gene p is responsible for the purple color pigment. both of them are located on two different loci on different chromosomes. the flowers will be purple only when the plant has the genotypes as c_p_. no color will be produced with genotypes: ccpp, ccpp, ccpp, ccpp. thus, gene c controls the expression of gene p. what pattern of inheritance is exhibited here? a. pleiotropy b. epistasis c. multiple alleles

At which point is crust neither created nor destroyed? island chain mid-ocean ridge divergent boundary transform boundary

Color blindedness is a sex-linked trait. if we could see the pedigree chart for several more generations of the family illustrated here, we would expect a) more males to be color blind. eliminate b) more females to be color blind. c) no females to ever be color blind. d) an equal number of males and females that are color blind.