Plant Evolution + Diversity: Plant Adaptations for Terrestrial Life

Plant Evolution and Diversity Section of Intro Biology. Chapter 17.1

11 cards   |   Total Attempts: 182
  

Cards In This Set

Front Back
Defining Characters of Land Plants (4)
1.Alternation of haploid and diploid generations 2.Walled spores produced in sporangia 3. Male and female gametangia 4. Multicellular, dependent sporophyte embryos
Closest Living Relatives of Plants
Green algae called charophytes
Opportunities of Terrestrial Life (3)
1. Unlimited sunlight 2. Abundant CO2 3. Initially, few pathogens or herbivores
Challenges of Terrestrial Life (4)
1. Maintaining moisture within cells 2. Obtaining and transporting resources 3. Supporting body 4. Reproducing and dispersing offspring without water
Plant Support Structures (2)
1. Roots/root-like structures anchor the plant into place
2. Lignin
Lignin (2)
1. Impregnates the conducting vessels of land plants. 2. This supports the plant helping it maximize the surface area exposed to the sun
Conducting Vessels (2)
1. Transport water and minerals upward from the roots to the rest of the plant body. 2. Transport sugar from the leaves to the rest of the body
Water Conservation Structures (2)
1. Cuticle
2. Stomata
Cuticle
Waxy coating on the surface of leaves and stems that limit water evaporation
Stomata
Pores that open to let gases flow in and out but close to conserve water
Non-Water Dispersal for Sex Cells and Offspring
1. Water-independent methods of gamete and zygote dispersal (e.g. pollen, seeds) 2. Structures that protect the developing embryo from drying out (e.g. flowers, fruits)