Plant questions (not my homework)?

please answer these q's. THEY ARE NOT FOR MY HOMEWORK!!!! it is on a study sheet and i don't have enough time to search the book, please help!!!! If you can fill this out it will be very helpfull and i will chose u as best answer!!!!!! THANX!!!



1)the four main types of plants and their characteristics



2)the main differences between monocot and dicot plants



3)what is a cotyledon?



4)what are the male and female parts of a flower? What parts become the seed and the fruit?



5)What is photosynthesis and where does nearly all photosynthesis take place?



6)What is a vascular plant and what advantage is there to being a vascular plant?



7)What is a tropism? What are the two main types of tropism and how does the plant react in each place?

Plant questions (not my homework)?
1. A- mosses- basic, no vascular tissue, reproduction requiires water

B- Ferns- vascular tissue present

C- gymnosperms- seeds

D- angiosperms- flowers and fruits



2. Monocots have one cotyledon, dicots have 2



3. cotyledons are the first leaves that sprout out of the seed, they contain nutrients for hte seed



4. male- stamen, female- pistil

Seed- sporophyte, fruit- ovary



5. Photosynthesis is the making sugar/energy from CO2 and light

Takes place in the stem and leaves (wherever green). or more specifically, in the chloroplasts, in the stroma and thylakoid membrane



6. Vascular tissue are a transport system, carrying water, minerals and sugar up to all parts of the tree

Advantages- grow bigger, compare mosses and trees



7. tropism is the plants tendency to grow

Phototropism- grow towards light. light slows down cell elongation in stem that it hits, opposite side grows faster

Gravitropism- roots grow downward. heavy molecules sink, thus coordinating top cells to elongate
Reply:U should do your own home work. Shame on U.



chuck

:-# ) Report Abuse
Reply:1) There are only TWO major types of plants: Vascular %26amp; Non-vascular plants. Vasculars are plants with full systems of leaves, stems, and roots and these are the main things in which they differ with non-vascular plants.



2) The name monocotyledons is derived from the traditional botanical name Monocotyledones, which derives from the fact that most members of this group have one cotyledon, or embryonic leaf, in their seeds. This as opposed to the (traditional) Dicotyledones which typically have two cotyledons. From a diagnostic point of view the number of cotyledons is neither a particularly handy nor reliable character.



3) A cotyledon (Greek: κωτυλυδ?ν) is a significant part of the embryo within the seed of a plant. Upon germination, the cotyledon usually becomes the embryonic first leaves of a seedling.



4) The "male" organ is the stamen or androecium, which produces pollen (male spores) in anthers. The "female" organ is the carpel or gynoecium, which contains the egg (female gamete) and is the site of fertilization. While the majority of flowers are perfect or hermaphrodite (having both male and female parts in the same flower structure), flowering plants have developed numerous morphological and physiological mechanisms to reduce or prevent self-fertilization. As the development of embryo and endosperm proceeds within the embryo-sac, its wall enlarges and commonly absorbs the substance of the nucellus (which is likewise enlarging) to near its outer limit, and combines with it and the integument to form the seed-coat; or the whole nucellus and even the integument may be absorbed.



5) Photosynthesis is an important biochemical process in which plants, algae, and some bacteria convert the energy of sunlight to chemical energy. The chemical energy is used to drive synthetic reactions such as the formaton of sugars or the fixation of nitrogen into amino acids, the building blocks for protein synthesis. Ultimately, nearly all living things depend on energy produced from photosynthesis for their nourishment, making it vital to life on Earth. It is also responsible for producing the oxygen that makes up a large portion of the Earth's atmosphere. Organisms that produce energy through photosynthesis are called photoautotrophs. Plants are the most visible representatives of photoautotrophs, but it should be emphasized that bacteria and algae also contribute to the conversion of free energy into usable energy.



6) Already explained



7) A tropism is a biological phenomenon, indicating growth or turning movement of a biological organism, usually a plant, in response to an environmental stimulus. In tropisms, this response is dependent on the direction of the stimulus (as opposed to nasties which are non-directional responses). The word tropism comes from the Greek tropos ("to turn"). Tropisms are usually named for the stimulus involved (for example, a phototropism is a reaction to light) and may be either positive (towards the stimulus) or negative (away from the stimulus).

Tropisms are typically associated with plants (although not necessarily restricted to them). Where an organism is capable of directed physical movement (motility), movement or activity in response to a specific stimulus is more likely to be regarded by behaviorists as a taxis (directional response) or a kinesis (non-directional response).