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A stem is one of two main structural axes of a vascular plant.A root is the organ of a plant that typically lies below the surface of the soil.A leaf is an organ of a vascular plant, as defined in botanical terms, and in particular in plant morphology.
A pure culture is defined as a population containing only a single species or strain of bacteria. Contamination means that more than one species is present in a culture that is supposed to be pure.
Pluto, according to novanet. Yes, but Pluto is not defined as a planet now, of course.
A liquid has no defined shape, but has a defined volume. A gas has no defined shape and no defined volume.
According to DIGITAL electronics logic connection can be defined as the combination of gates to realised a particular logic function. e.g decoder; multiplexer; demultiplexer etc
morphology
The taxon species can be defined by reproductive isolation, which refers to the barrier that stops individuals from different species from producing viable offspring. This isolation can occur through mechanisms like behavioral, temporal, or genetic differences that prevent successful mating or offspring production between populations.
Offspring of a horse and donkey are unable to reproduce
Reproductive capacity is defined as a measure of the capacity of a species to reproduce itself under optimum conditions. For example, the reproductive capacity of a human would be a single child (or multiples) every 10 to 12 months for approximately 30 active reproductive years.
This refers to a species, which is the most restrictive taxon in biological classification, that can only successfully reproduce among individuals within their own species. This concept is fundamental to understanding how species are defined and how they maintain their genetic integrity through reproductive isolation.
Evolution, as defined by scientists today, is a undirected, purposeless mechanism. So, to answer your question, evolution is not driven by anything.In a sense, evolution is driven by reproductive variation and differential reproductive success. Reproductive variation providing random drift, and differential reproductive success providing a measure of "direction" to this drift.
Adulthood may be defined as when an animal reaches reproductive age. Reproductive age in the Thylacine was believed to be about fifteen months. Note that Thylacines are now extinct.
Single-celled organisms are sometimes asexual. Another example would be spores, which do not have defined genders.
There is a theory that technology creates neurosis. Neurosis is generally defined as an irrational anxiety. Technology neurosis is said to cause social isolation.
Normality is defined according to the cultural norms of the society in question and is therefore highly subjective.
Yes, you can get pregnant if you were born with enterocolitis. Coloenteritis or enterocolitis is defined as the inflammation of the digestive tract and does not affect the reproductive organs.
Jellyfish are hermaphroditic animals. They possess the reproductive organs of both the male and female sexes, without any defined male and female characteristics.