In May 2016, the estimated total number of species on Earth is about 1 trillion. (4) In 2011, the Census of Marine Life estimated about 8.7 million eukaryote species on Earth. (5) Unfortunately, many of the living things (probably over five billion species) that ever lived on Earth became extinct.
Living things were initially classified as either a plant or an animal. While both animals and plants are eukaryotic, they are distinguished based on their defining characteristics, e.g. in terms of motility, mode of nutrition, and cellular features. Animals, basically, are living things that are motile and heterotrophic whereas plants are those that are non-motile, photosynthetic, and have a cell wall. However, bacteria and archaea are neither plants nor animals mainly because they are prokaryotes (i.e. lacking in membrane-bound cytoplasmic organelles, including nucleus).
Living things are an organized structure. It may be a single-celled such as a bacterial cell, or multicellular such as animals and plants that are made up of several cells. A cell is the fundamental biological unit of an organism. Various cellular processes are carried out by the cell in an orchestrated, systematized manner. A cell consists of protoplasm surrounded by a plasma membrane. Cytoplasmic structures (e.g. organelles), each with specific roles and functions, are suspended in the cytosol of the cell.
Living things require energy for survival. Energy is essential as it fuels numerous metabolic activities of a cell. One way that organisms synthesize energy is by photosynthesis where light energy is converted into chemical energy. Another is by cellular respiration wherein biochemical energy is harvested from an organic substance (e.g. glucose) and, then, stored in an energy-carrying biomolecule such as ATP for later use.
A living thing is capable of reproducing. There are two ways by which living things can reproduce copies of themselves: sexual reproduction and asexual reproduction. In sexual reproduction, male and female sex cells of the two parents unite and form a zygote that will develop eventually into a being of their own kind. Asexual reproduction, in contrast, is a mode of reproduction that does not involve the fertilization of gametes or sex cells. The offspring comes from only one parent. Examples include binary fission, budding, vegetative propagation, sporogenesis, fragmentation, parthenogenesis, apomixis, and nucellar embryony.
Living things grow. At the cellular level, growth may refer to an increase in number or to an increase in size. The increase in the number of cells is through cell division. The stem cells of animals and the meristematic cells of plants divide to give rise to new cells. As for the increase in cell size, it is attributed often to the increase in cytoplasmic mass.
A living thing metabolizes. Metabolism refers to the various processes that are responsible for the keeping up of the living state of a cell or an organism. Examples of those involved in cell growth, respiration, reproduction, response to stimuli, sustenance, biomolecular syntheses, waste elimination, and other homeostatic processes.
There are two forms of metabolism: catabolism and anabolism. In catabolism, living things carry out degradative chemical reactions that lead to the breaking down of complex molecules into smaller units and obtain energy that is released from the process. In anabolism, energy-driven chemical reactions build molecules from smaller units.
Living things respond to stimuli and adapts to environmental changes. It can detect changes in the environment, especially by cells that function as receptors. For instance, humans have five fundamental senses: sight, hearing, smell, touch, and taste. Other senses are the vestibular sense (detects body movement, direction, and acceleration), sense for thermoception, kinesthetic sense (detects body part positions), internal sense (interoception), and so on. Apart from detecting changes in its surroundings, it can also adapt to these changes.
A living thing moves. Since a living thing can detect stimuli from its surroundings, it can respond accordingly. For example, animals move to forage, escape predators, and seek a potential mate. While animals can move at will, plants have a rather limited form of movement, referred to as nastic movement (e.g. thigmonasty, nyctinasty).
Living things die. A living thing has life and this life ends eventually. Senescence refers to biological aging. It is when living things gradually deteriorate over the course of their life. The organism gradually loses its ability to function and deal with stressors. As such, it becomes more vulnerable to diseases and dysfunction. At the cellular level, the cell no longer divides although it may still be metabolically active. One of the natural causes of cellular senescence is the shortening of telomeres leading to DNA damage. Conversely, some living things are regarded as immortal because they seem to circumvent death. Examples include the age-reversing jellyfish Turritopsis doohmii, the regenerating flatworms, and the seemingly indestructible tardigrades.
Are viruses living things? This question has sparked major debate among biologists for so long. Some would consider viruses as living things since they appear to be alive when they are inside their host. They possess genetic material, replicate themselves, and evolve by natural selection. However, others do not take them as living things because they are essentially dead when outside their host. Viruses cannot reproduce independently.
The study of living things is called biology (also called biological science). An expert in this field is called a biologist. Several areas of biological studies include morphology, anatomy, cytology, histology, physiology, ecology, evolution, taxonomy, and pathology.
> But I've got a interview with Jeff when he said people read all kinds of> things in to his songs.> He was asked if Livin' Thing was a song about a 'Whale' and someone even> said it was a song about Abortion....But Jeff said it was a song about> nothing - '....the words just rhymed, that all.'> > Mark
I've heard his say such about this song, and others too; I think it'sjust an attempt at self-effacement. Sort of a aw-shucks, I dunno whutthe songs is about, I just writes em... I figure he'd rather letpeople draw their own interpretations, which is more important than whathe had in mind anyway, really. I just can't believe the song is about'nothing.'My own take, derived mainly from the chorus, is that the 'lining thing'is naivete, innocence, and wide-eyed illusions that everybody loves youback.But I dunno.regards,hammer
Sarah, if Jeff heard you say that, he'd smile. In a radio interview in thelate 70's, he spoke of getting great satisfaction from writing songs to whichpeople related. He felt he was really accomplishing something. Jeff told astory about a guy coming up to him and telling him how the lyrics of "TelephoneLine" related to his life, and Jeff was really touched by that.:D
>I'm not sure what "Livin' Thing" is about...and I've heard as well that most of>Jeff's songs aren't really about anything...it was all about the music...but>when I listen to that song...I remember that one timeI was thinking about>it...and what I got out of it was it's about life...life is a given thing and>it is a terrible thing to lose...looking back on your life, seeing where you>are going and where you've been "moving in line then you look back in time to>your first day" ...taking chances "Takin' a dive" ... and once you do you have>to go with the flow "cos you can't halt the slide" Basically life...but I guess>I got that out of it cos my friend was feeling kind of desperate at the time
>different things to you at different times in your life...it may mean one thing>to you one day ..then it'll change the next week...but that's part of the>beauty of ELO they always have something bright and new to offer you...
I think you hit it on the head what the song ACTUALLY means. Jeff is alot like me. I unconsciously write things down in my poetry or storieswith no set frame in mind. They are nice tunes which is something that might be lost on Today'sGeneration. I can figure what songs mean later on. It's the music.melody and harmony I want to hear first.
>> I find that many of Jeff's songs will mean>>different things to you at different times in your life...it may mean one>>thing>>to you one day ..then it'll change the next week...but that's part of the>>beauty of ELO they always have something bright and new to offer you...>
>Sarah, if Jeff heard you say that, he'd smile. In a radio interview in the>late 70's, he spoke of getting great satisfaction from writing songs to which>people related. He felt he was really accomplishing something. Jeff told a>story about a guy coming up to him and telling him how the lyrics of "Telephone>Line" related to his life, and Jeff was really touched by that.
As the thread originator, I'm beaming! Really, though, I would love to do much more of this discussingwhat the meaning of many of ELO's songs is with others in thegroup. I think that they have held much mystery for me and,like a layman unearthing Merlin's secrets, I would love todiscover the meanings of the ELO songs. -- % Randy Yates % "Watching all the days go by... Who are you %% Sonar Signal Processing % and who am I?"%%% Florida Atlantic University % 'Mission (A World Record)', %%%% % *A New World Record*, ELO ~yates
She would roller-skate the whole night around everybody, and usually did. And in one scene, she started roller-skating outside the film perimeter. And I remember her crossing Van Nuys Boulevard. She was fairly far away and basically wearing next to nothing, just enjoying her character. 781b155fdc