Consider statements about scientists: 1. Edward Jenner developed the smallpox vaccine. 2. Alexander Fleming discovered penicillin. 3. Louis Pasteur discovered the structure of DNA. Which are correct? MCQ with Answer and Explanation

Explanation:
Xylem is the vascular tissue responsible for the unidirectional upward transport of water and dissolved minerals from the roots to the aerial parts of the plant. Phloem is the vascular tissue responsible for the translocation of organic nutrients (primarily sucrose) from sources to sinks, which can be bidirectional (up or down depending on the plant's needs). Cambium (vascular and cork) is a lateral meristem responsible for secondary growth, which is the increase in the girth or thickness of stems and roots. All statements are correct.

Explanation:
A gene is a segment of DNA that codes for a functional product (protein or RNA) and is the basic unit of heredity. It determines traits. Chromosomes are structures containing many genes. DNA is the genetic material, and nucleotides are the building blocks. Genes are passed from parents to offspring.

Explanation:
Apiology is the specific branch of zoology dedicated to the scientific study of bees, including their biology, ecology, and behavior. Malacology studies mollusks, myrmecology focuses on ants, and entomology is the broader study of all insects. Exam tip: Remember 'Api' relates to Apis, the genus of honeybees.