Ch. 36 Book Review Guide. Extremely Detailed

15 Pages
Unlock Document

University of Toronto Mississauga
Angela B Lange

Bio204 Ch. 36 Plant Form and Function -indeterminate growth: continues to grow throughout its life, until death. -in response to favorable conditions, a plant send roots and shoots in the most promising directions, seeking out more and more light and the simple compounds it requires. 36.1 Plant form: Themes with many variations -For photosynthesis to occur, plants need large amounts of light and carbon dioxide and a small amount of water as an electron source. Plants also need large amounts of water to fill their cells and maintain them at normal volume and pressure -To sunthesize nucleic acids, enzymes, phosopholipids, and other macromolecules needed to build and run cells, plants must obtain nitrogen, phosphorus, potassium, magnesiums, and some other nutrients -To acquire these resources for photosynthesis, plants use two basic systems, a Root System and a Shoot System -The root system below ground anchors the plant and takes in nutrients and water from the soil - The shoot system: harvests light and carbon dioxide from the atmosphere to produce sugars. -These systems grow throughout the life of the individual, allowing the plant to increased in size, overtop competitors, and forage for the resources it needs. -in most plants the root and shoot systems are connected by vascular tissue. Water is transported from the roots to the shoots through vascular tissue. Sugars and other nutrients are transported in both directions. -Herbaceous plant: or herb, meaning a seed plant that lacks wood and has a relatively short lived stem www.notesolution.comThe Root System -a vertical section called a Taproot -numerous lateral roots that run more horizontally -functions to anchor the plant in the soil, absorb water and ions from the soil, conduct water and selected ions to the shoot, and store material produced in the shoot for later use. Morphological Diversity -Although above ground portions of prairie plants are burned during fires and die back during the winter or dry season, their roots are perennial thus their root system sends up a new shoot system after a fire or each spring. -Perennial root systems: living for many years -Natural selection has favored a diverse array of root systems among species that grow in the same habitat, to minimize competition for water and nutrients. -Diversity of root systems observed in prairie plants has two important consequences: (1) an array of prairie plants can coexist in the same area with less competition for soil and resources (2) most individuals can survive water stress during drought years -Each type of root system is specialized for acquiring resources from a different region of the soil. Phenotypic Plasticity -Phenotypic plasticity: roots are changeable depending on environmental conditions (genetically identical individuals will have diff. looking root systems in different environments) -Roots actively grow into areas of soil where resources are abundant; roots do not grow or die back in areas where resources are used up or lacking Modified Roots -Adventitious root: a root that develops from the shoot system instead of the root system. Ex. Prop roots
More Less

Related notes for BIO203H5

Log In


Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.