Describe the primary growth of a stem and explain how growth of lateral shoots is suppressed.
What will be an ideal response?
When the shoot of a plant first starts to grow from its apical meristem, leaves first appear as leaf primordia, clustering around the meristem. As the stem elongates farther, the leaves unfold. A tiny bud, containing a side shoot, develops in the axil of each leaf. A hormone secreted by the terminal bud of a shoot keeps these side shoots from developing. If the terminal bud is removed, the side shoots unfold and develop.
You might also like to view...
Which of the following molecules help maintain cell-cell adhesions in plants?
A. cadherins B. pectins C. integrins D. cellulose
A heritability value of 0.997 indicates which of the following?
A. The majority of the phenotypic variation has a genetic basis B. The majority of the phenotypic variation has an environmental basis C. The trait is polygenic D. There is a significant difference between the two strains
Which of the following are NOT protists?
a. bacteria b. diatoms c. slime molds d. dinoflagellates e. euglenoids
Why do pine trees have two different types of cones?
A) One type produces the gametophyte, the other type produces the sporophyte. B) One type produces ovules, the other type produces pollen. C) One type is produced in the fall, the other type is produced in the spring. D) One type produces seeds, the other type produces fruit.