Elements of Biology: A Practical Text-book Correlating Botany, Zoology, and Human PhysiologyAmerican Book Company, 1907 - 445 páginas |
Dentro del libro
Resultados 1-5 de 30
Página 26
... membrane . This is so thin that it is impossible to get a microscope of power enough to throw any light on its structure . Outside this membrane a wall is formed by the activity of the protoplasm in the cells of plants . In the cells of ...
... membrane . This is so thin that it is impossible to get a microscope of power enough to throw any light on its structure . Outside this membrane a wall is formed by the activity of the protoplasm in the cells of plants . In the cells of ...
Página 32
... membrane under it , the whole inclosing a mass of protoplasm . At an early stage the pollen grain contains but a single cell . When we see it , however , we can distinguish two nuclei in the protoplasm . Hence we know that at least two ...
... membrane under it , the whole inclosing a mass of protoplasm . At an early stage the pollen grain contains but a single cell . When we see it , however , we can distinguish two nuclei in the protoplasm . Hence we know that at least two ...
Página 88
... membrane . Clinging close to the cell membrane is the protoplasm of the cell , which in the root hair is found close to the membrane . The interior of the root hair is more or less filled with a fluid called cell sap . Forming a part of ...
... membrane . Clinging close to the cell membrane is the protoplasm of the cell , which in the root hair is found close to the membrane . The interior of the root hair is more or less filled with a fluid called cell sap . Forming a part of ...
Página 89
... membrane that lies underneath it until about one square inch of the membrane is exposed . Now break a small hole in the opposite end of the egg just large enough to admit a small glass tube . After putting the tube in place , cement it ...
... membrane that lies underneath it until about one square inch of the membrane is exposed . Now break a small hole in the opposite end of the egg just large enough to admit a small glass tube . After putting the tube in place , cement it ...
Página 112
... membrane . Digestion . As we shall see later , the food for a plant is manu- factured in the leaves . Much of this food is in the form of starch . But starch , being insoluble , cannot be passed from cell to cell in a plant . It must be ...
... membrane . Digestion . As we shall see later , the food for a plant is manu- factured in the leaves . Much of this food is in the form of starch . But starch , being insoluble , cannot be passed from cell to cell in a plant . It must be ...
Otras ediciones - Ver todas
Términos y frases comunes
adapted alcohol American Book Company amount animal arteries bacteria bean beetle birds blood vessels bone Botany breathing called carbon dioxide cause cells cerebrum color colorless corpuscles containing corn corpuscles cotyledons covered crayfish developed dicotyledonous digestive eggs endosperm example experiment fibers fish flower fluid frog fruit germinate gills glands grain green grow growth heart heat Hunter and Valentine insects intestine kidney known laboratory large number larvæ layer leaf leaves legs living lungs Manual means membrane microscope mollusks monocotyledon mouth muscles muscular nerve nervous system nitrogen Notice organs outer ovary oxidation oxygen parasitic pass Physiology pistil pollen proteid protoplasm root hairs seedlings seeds seen shell side skeleton skin soil species sporangium spores stamens starch stem stomach stomata structure substance sugar surface teeth temperature tiny tion tissues tree veins vertebral vertebral column walls wings worm Zoology