Double Fertilization Fertilization in flowering plants is unique among all known organisms, in that not one but two cells are fertilized, in a process called double fertilization. One spermnucleusin the pollen tube fuses with the egg cell in the embryo sac, and the other sperm nucleus fuses wit...
Fungi absorb their nutrients in three different ways: (1) saprobes decompose dead organic matter; (2) parasites feed on living hosts; and (3) mutualists live in symbiotic unions with other living organisms. Saprophytic fungi, such as edible meadow mushrooms ( Agaricus campestris ), shiitake ( ...
There are two different ways in which glucose is oxidised to provide energy in various organisms : aerobic respiration, and anaerobic respiration. Aerobic respiration uses oxygen (of air) whereas anaerobic respiration takes place without oxigen. (i) In
Evolutionary adaptations allow organisms to survive and reproduce in different ___. A. environments B. species C. populations D. ecosystems 相关知识点: 试题来源: 解析 A。进化适应使生物能够在不同的环境中生存和繁殖。选项 B“species”是物种,不是生物生存和繁殖的条件。选项 C“populations”是种群...
Although sexual eukaryotes have to recombine to reproduce as organisms, not all eukaryotes are sexual. Some highly recombinogenic bacteria can be treated as effectively sexual in population genetic models, even if they reproduce clonally as organisms. Authors also make too much of eukaryotic ...
How will an organisms be benefited it it reproduces through spores? 03:04 Can you think of reasons why more complex organisms cannot give rise t... 02:56 Why is vegetative propagation practised for growing some types of plan... 03:49 Why is DNA copying an essential part of the process...
What are some ways that plants reproduce sexually using non-living mechanisms? What happens when genetically-modified crops are exposed to these living organisms and n What is the difference between r-selected species and K-selected species? Give an example of each. Explain how you may get an...
entitledThe Formation of Vegetable Mould Through the Action of Worms.At the time, it was a bestseller and even sold more copies upon the weeks following its initial release thanOn the Origin of Speciesfor that Darwin is now more widely known. Some of the ways in that earthworms benefit our...
By leaving an impact on their physical and social environment, organisms may affect the evolution of their own descendants, quite apart from changing the conditions for themselves. Some of the impact is subtle, such as when a plant sheds its leaves that fall to the ground and change the ...
Describe the characteristics of single-celled organisms. Described two ways in which bacteria differ from Euglena or paramecium. What is the difference between a one-celled organism and a single cell of a multicelled organism? (a) What makes protists, animals, fungi, plants,...