The Plant Kingdom The oldest and most simple photosynthetic organisms on earth are algae. The multicellular algae are separated into divisions based on their photosynthetic pigments, food storage products, and cell-wall components. The three major groups include: Brown algae
Red algae Green algae The Plant Kingdom Green algae are thought to have given rise to the
higher plants. They have the same pigments, storage products, and cell-wall type. Also, many of them live in fresh water The different plants selected for adaptations that allowed them to exploit more of the
terrestrial regions What adaptations would you need for transition of life on to land? The Plant Kingdom What are the problems of the transition from water to land? Problem 1: Desiccation
Solution: waxy cuticle covers surfaces of leaves. Problem 2: Waxy cuticle also impermeable to gases how does gas exchange occur? Solution: stomata small pores typically found on the underside of leaves. The opening and closing of the pores can be controlled as needed. Problem 3: Structural support there is no water to hold the plants up Solution: lignin an organic polymer that when deposited during secondary thickening, makes the plant woody and therefore rigid. Problem 4: Source of water and nutrients?
Solution: Water and nutrients are taken up by the root and vascular systems. Problem 5: Reproduction fertilization and dispersal without a liquid medium Solution: Use complex systems to employ wind, water, and different organisms for both fertilization and dispersal more later The Plant Kingdom Although liverworts, mosses, and particularly ferns have
many adaptations for life on land, gymnosperms and angiosperms are the only plants that are most adapted for life on land hence their success!!! The Plant Kingdom structure of a leaf
What is the function of the leaf? What structural form will best suit this function? What are the problems associated with this structural form?
How does the plant deal with these problems? (cuticle, stoma and guard cells, vascular bundle) The Plant Kingdom Vascular system The vascular tissue system is responsible for transport of water, minerals, sugars, and plant hormones. There are primarily two types of vascular tissues found in plants:
1. Xylem responsible for moving water and minerals from roots to shoots. Typically they make up of non-living tissue 2. Phloem carries substances synthesized by the plant, including sugars, amino acids, and hormones. Phloem cells are however all living why? Note that this system is continuous throughout the plant, from the roots all the way to the smallest of the leaves
So how do you think water and nutrients get transported using the vascular system? What are the forces acting on each tissue type? The Plant Kingdom Reproduction Alternation of Generations The Plant Kingdom Reproduction
Mosses: The Plant Kingdom Reproduction Ferns: The Plant Kingdom Reproduction
Gymnosperms: The Plant Kingdom Angiosperm Reproduction The Plant Kingdom Angiosperm Reproduction The Plant Kingdom Angiosperm Reproduction
The Plant Kingdom Angiosperm Reproduction The Plant Kingdom Angiosperm Reproduction The Plant Kingdom Angiosperm Reproduction So why are angiosperms so successful?
The Plant Kingdom How do plants defend themselves against herbivores? Mechanical defenses: Waxy cuticle prevents bacterial and fungal growth Hairy or sticky leaves discourage caterpillars and other tiny herbivores Spines, thorns, and prickles fend off larger mammalian herbivores Chemical defenses: Thousands of different compounds are produced and used by plants.
Some of these chemicals include some of the most powerful drugs known to humans (e.g. caffeine, nicotine, cocaine, morphine, etc.) The Plant Kingdom Review of some major concepts in plants: Plants are multicellular, photosynthetic eukaryotes. Plants evolved from a green algal ancestor All plants alternate between sporophyte and gametophyte generations
Major trends in evolution of the plant kingdom * growing independence from liquid water * increasing size and independence of the sporophyte generation Non-vascular plants include mosses and liverworths they lack true leaves and roots why? Xylem is a vascular tissue for conducting water and minerals; phloem is a vascular tissue for conducting foods. Gymnosperms and angiosperms possess seeds; ferns do not
Non-vascular plants and ferns depend on liquid water for fertilization The Plant Kingdom Review of some major concepts in plants (cont.): The pollen of seed plants has evolved mechanisms for dispersal, so liquid water is not needed for the transfer of male gametes. Gymnosperms have a life cycle in which naked seeds are produced on the scales of cones
Angiosperms are distinguished by the production of flowers and fruits.
Definition of CK not entirely standard: most consider >3 abnormalities and a few consider >5 abnormalities. Monosomal karyotype = two autosomal monosomies, or one autosomal monosomy associated with at least one structural abnormality. Most AMLs that fulfill criteria for CK...
Variational Inference for Dirichlet Process Mixture. Daniel Klein and Soravit Beer Changpinyo. October 11, 2011. Applied . Bayesian . Nonparametrics. Special Topics in Machine Learning. Brown University CSCI 2950-P, Fall 2011
Your CRM Solution - Riva Integration Server Riva Server-side Synchronization Solves the iPad Problem Microsoft Outlook Microsoft Outlook, Outlook Web Access, BlackBerry, ActiveSync devices, Entourage for Mac, iPad, iPhone, Mac Mail / iCal / Address Book and all GroupWise clients...
CVO Field Investigation. Case Login. Credit Appraisal. Telephonic Verification. Case Approval. Document Collection. RTGS/Cheque. SAPNE AAPKE BHAROSA APNO KA. Why Intec. ... Intec Capital Limited being honored as the "Best NBFC" by India SME Forum. FY 2014-2015.
Importance of Se Human health Acts as an antioxidant Cancer, Arthritis, Heart disease Immune system Controlling viral emergence and evolution Optimize cellular and humoral immune processes Toxicity and Deficiency Selenosis, Keshan disease, Kaschin-Beck disease Bison Spiritual animal associated ...
Education on Lethal Means Safety. NAVADMIN 263/14. New posters and graphics. Free gun locks available at FFSCs and NOSCs. Columbia Suicide Severity Rating Scale (C-SSRS) Self-paced targeted training for gatekeepers coming soon. Thomas Joiner's Theory of Suicide. Belonging, Burdensomeness, Acquired...
An Introduction to Linear Kinematics Linear Kinematics Linear Kinematics description of the motion of a body the appearance of a motion with respect to time Motion described in terms of (variables): Distance, displacement, length (e.g. stride, stroke) Time, cadence (e.g....
Make a key at the bottom. You should differentiate each part with a different color: a. The subject. b. The verb ... What does Mercutio say about Tybalt? Lines? 4. Near line 85, what point is Mercutio trying to make...
Ready to download the document? Go ahead and hit continue!