Answer:
Explanation:
5c What is crop rotation?
Crop Rotation is the growing of different crops in succession on a piece of land to avoid exhausting the soil and to control weeds, pests, and diseases.
State two advantages of crop rotation
Increases soil fertility
Increases crop yield
Increases soil nutrients
6ai What is population?
Population is a particular section, group, or type of people or animals living in an area or country.
Species is a group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding.
In order for the local residents to lower the frequency of landslides in the region that experiences frequent landslides from heavy rains, they should do the following:
A. Start contour plowing on the slopes where landslides happen.
B. Plant vegetation on the slopes that experience landslides.
Answer:
3/16
Explanation:
Two true-breeding stocks of pea plants are crossed. One parent has red RR, axial flowers AA and the other has white rr, terminal flowers aa
Parent cross RRAA x rraa
Gamete: RA x ra
F1 gen. RrAa
Selfing of F1. RrAa x RrAa
F2 offspring
Rr x Rr Aa x Aa
RR Rr rr AA Aa aa
3/4 red 1/4 white 3/4 axial 1/4terminal
Probability of plants with white axial flowers is 1/4*3/4 = 3/16
The duplication of centrioles occurs at the same time as DNA duplication for the cell cycle; that is, in the S phase of interphase.
