In angiosperms, a ________________ is contained in the anthers or ovaries, and the ____________ consists of the rest of the plant
A. sporophyte; bryophyte
B. gametophyte; sporophyte
C. sporophyte; gametophyte
D. bryophyte; sporophyte
B
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The majority of human infections with Campylobacter species are caused by:
a. direct contact with carriers of the bacte-rium. b. contamination of food, milk, or water with animal feces. c. multiplication of the organism in food products. d. direct contact with persons infected with the bacterium.
Some dogs have erect ears; others have drooping
ears. Some dogs bark when following a scent; others are silent. Erect ears and barking are due to dominant alleles located on different chromosomes. A dog homozygous for both dominant traits is mated to a droopy-eared, silent follower. The expected phenotypic ratio in the F1 generation is a. 9:3:3:1. b. 100 percent of one phenotype. c. 1:1. d. 1:2:1. e. none of these.
Which of the following steps is not one of the phases of a fungal invasion of a plant?
A. Fungal DNA is replicated by the plant cells. B. Hyphae differentiate into specialized structures called haustoria. C. Hyphae grow through cell walls and press against the cell membrane. D. Windblown fungal spores land on plant leaves. E. A fungal spore germinates and forms an adhesion pad that allows it to stick to a plant's leaf.
All autoimmune diseases have a genetic cause.
Answer the following statement true (T) or false (F)