Concepts in BiologyWm. C. Brown Publishers, 1991 - 535 страница Concepts in Biology is a short, student-friendly text organized in a traditional manner. It has very little botany and presents a human-oriented approach to the animal unit. Professors and students appreciate the low cost of this title, and that it is written for students who are not biology majors. |
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Страница 67
... materials to accumulate in a cell is illustrated here . Notice that the concentration gradient is such that if simple diffusion were operating , the molecules would leave the cell . The action of the carrier requires an input of energy ...
... materials to accumulate in a cell is illustrated here . Notice that the concentration gradient is such that if simple diffusion were operating , the molecules would leave the cell . The action of the carrier requires an input of energy ...
Страница 115
... materials from animals . Thus , animals supply raw materials - CO2 , H2O , and nitrogen - needed by plants , while plants supply raw materials - sugar , oxygen , amino acids , fats , and vitamins - needed by animals . This constant ...
... materials from animals . Thus , animals supply raw materials - CO2 , H2O , and nitrogen - needed by plants , while plants supply raw materials - sugar , oxygen , amino acids , fats , and vitamins - needed by animals . This constant ...
Страница 387
... materials and as a raw material for photosynthesis . If these are not present in the soil , the growth and reproduction of plants is inhibited . However , if fertilizer supplies these nutrients , or irrigation is used to supply water ...
... materials and as a raw material for photosynthesis . If these are not present in the soil , the growth and reproduction of plants is inhibited . However , if fertilizer supplies these nutrients , or irrigation is used to supply water ...
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What Is Biology? | 2 |
What Is Biology? | 11 |
1 Edward Jenner and | 15 |
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activities allele amino acids amount animals atoms attached bacteria behavior biological body bonds called carbohydrates carbon dioxide cause cell membrane cellular cellular respiration centrioles changes chapter characteristics chemical chromatids complex contain cycle cytoplasm diet diploid disease ecosystem EeDd electrons energy environment enzyme eukaryotic example factors female fertilization Figure free earlobes function gametes gene frequencies gene pool genetic genotype glands glucose growth haploid homologous chromosomes hormones human hydrogen increase individual insects intestine involved ions kcalories kinds living things male materials meiosis metabolic mitosis mRNA muscle mutation neuron nitrogen normal nucleotides nucleus nutrients occur offspring oocyte organelles organic molecules ovary oxygen pair parasites PGAL phosphate photosynthesis plants population produce prokaryotic protein protons pyruvic acid reactions released reproduction respiration result ribosomes sexual species sperm stage structure substrate sugar surface synthesis trophic level vitamins X chromosome