Which of the following plants can survive freezing temperatures if the temperature gradually drops from lower and lower each night?
a) maple trees
b) irises
c) tomatoes
d) all of these
Selective breeding is the art and science of changing the…….of plants in order to produce desired characteristics.
a) environment
b) structure
c) genetics
d) conditions
Plant breeding uses deliberate interbreeding of closely or distantly related individuals to produce new crop varieties with desired characters is called
a) interbreeding
b) crossing
c) hybridization
d) backcrossing
Progeny from the cross would be crossed with high-yielding parent to ensure that the progeny were most like the high-yielding parent is called……….
a) interbreeding
b) crossing
c) test crossing
d) backcrossing
Which of the following bacterium/bacteria is/are used to insert a desired gene in the plant is/are………
a) Agrobacterium tumefaciens
b) Agrobacterium rhizogenes
c) Thermus aquaticus
d) both a and b
Which of the following is/are the direct method/s of inserting desired genes in plants for genetic modification?
a) microinjection
b) intra-uterine injection
c) gene gun
d) both a and c
