Eucalyptus

Eucalyptus Description The leaves are leathery in texture, hang obliquely or vertically, and are studded with glands containing a fragrant volatile oil. The flowers in bud are covered with a cup-like membrane (whence the name of the genus, derived from the Greek eucalyptos well-covered), which is thrown off as a lid when the flower expands. The fruit is surrounded by a ...

Read More »

Reproductive Shoot Apex

Reproductive Shoot Apex (Floral Apex) The reproductive apex produces a flower or an inflorescence and replaces the vegetative apex. The flowering shoot is considered as homologous to the vegetative shoot. According to Gregoire, the reproductive meristem is structurally different from vegetative meristem. He suggested that reproductive apex consists of a meristematic Mantle and a Core. The two superficial layers of ...

Read More »

Absorption Of Water In Plants

Absorption Of Water In Plants Soil The complex composite mass made up of both inorganic and organic, components containing water and air is called soil. There are different amount of various components of soil. Their amount and depends upon the nature of the soil, its depth and the state of its irrigation. The ordinary garden soil has the following composition ...

Read More »

Genetics Quiz Questions And Answers

Multiple Choice Questions (MCQs) and Fill In the blanks Experiments on Plant Hybridization was written by: (a) Sutten          (b) Mendel    (c) Darwin     (d) De Varies Word gene was used by: (a) Sutten      (b) Mendel    (c) Bateson    (d) De Varies The cross in which two characters are followed at the same time is called: (a) Monhybrid cross           (b) Reciprocal cross (c) ...

Read More »

Types of Gymnosperms

Principal Types of Gymnosperms On the basis of shoot apex three principle types of gymnosperms can be distinguished: The Cycas Type: In this type, three meristematic zones can be distinguished: Surface Meristem: The cells are not uniform in the appearance and divide anticlinally, periclinally and diagonally. The apical initials have been distinguished in the seedlings of Cycas revolute, but not ...

Read More »

genetics practice problems

genetics practice problems  What is Clinical genetics? Ans:     It includes the training of genetists to diagnose, treat, and counsel patients with genetic disorders or syndromes. Who did rediscovred Mendel’s work? Ans: re-discovered” by three European scientists, Hugo de Vries, Carl Correns, and Erich von Tschermak. What was the contribution of Thomas Hunt Morgan in genetics? Ans: He and his assistants ...

Read More »

Sex linked Inheritance

Sex linked Inheritance   The inheritance of a trait (phenotype) that is determined by a gene located on one of the sex chromosomes is called sex linked inheritance. The expectations of sex-linked inheritance in any species depend on how the chromosomes determine sex. For example, in humans, males are heterogametic. It has one X chromosome and one Y chromosome. But ...

Read More »

Water Relations Of Plants

Water Potential (qp) The chemical potential of water is called water potential. The total kinetic energy of the molecules is called water potential. The chemical potential of water depends on the number of water molecules. Thus it is expressed as energy per mole of water molecule. The chemical potential of pure water is taken as zero. The kinetic energy of ...

Read More »

Plant Anatomy Theories

Plant Anatomy Theories Different theories about plant anatomy and different types of cells playing important role in proper functioning of plant, given by different scientists & botanists accordingly with passage of time are as follow: Apical Cell Theory: According to this theory, in pteridophytes one or more initials are recognized which are responsible for the formation of all the cells ...

Read More »

Mendelian Genetics

          Mendelian Genetics Chapter 10 section 2 mendelian genetics Introduction of Mendel Gregor Joha Mendel was borne in 1822. He died in 1884. He was a priest. He formulated two laws of heredity: (a)   Law of segregation (b)   Law of independent assortment. Mendel presented his findings to Brunn Society for the study of Natural Science in ...

Read More »
Distributed by name369.com