Two pure lines of four-o'clock plants, one with red flowers and the other with white flowers, are crossed. The F1 progeny all are pink. When these are selfed, the F2 progeny are 25 percent red flowers, 50 percent pink flowers, and 25 percent white flowers. This is an example of.

Explanation:

As given here;

Two pure line of four-o'clock plant, one having red flower and other having white flower, when they are crossed, they produce all pink progeny.

So, lets red as RR and white as rr

Cross between RR and rr

Here all offspring are Rr ( Pink ).

It's the result of incomplete dominance, in complete dominance the offspring is the intermediate of both the parents.

F2 generation:

As cross between Rr and Rr

progeny are: RR, Rr, Rr, rr

RR =red

Rr= pink

rr= white

So,  red: pink: white = 25:50:25

correct answer: understand the different control methods available

integrated pest management is an strategy that is based on the ecosystem and try to prevent the pest and the damage caused by them by applying combination of technique like habitat manipulation, biological control and use of resistant varieties.

the main aim of the integrated pest management is not to completely eliminate the pest but to strengthen the ecosystem so that conditions are favorable for plants and unfavorable for pests.

answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.