CHROMOSOMES
species
The haploid number of a non-human organism refers to the number of unique chromosomes present in its gametes. This number can vary widely among different species of plants and animals.
A dichotomous key is a special document that allows the reader to 'key out' an organism to some level, sometimes species, sometimes a level above species. Basically a key is a series of double statements. Each double statement has only one possible right answer; either the organism has some trait, or it doesn't. Depending on the answer, you are then taken to the next level of statements, each pair of statements whittles down the possible number of species that your organism could possibly be, and eventually lands you on the species, or genus that your organism is in.
Yes, all cells within an organism (excluding gametes) typically have the same number of chromosomes, known as the diploid number. This number is characteristic of the species and remains constant throughout most of the organism's cells. Gametes, such as sperm and eggs, have half the number of chromosomes (haploid) to ensure the correct chromosome count is restored upon fertilization.
If in a given species, every organism survived to adulthood and then had exactly the same number of offspring as every other organism in that species, there would be a few interesting consequences. Given the universal survival and reproductive success, that species would experience a population explosion. Eventually, this would have to produce general starvation, since food supplies cannot expand indefinitely. Also, the process of evolution would come to a stop, for that species. If everybody survives and reproduces to the same extent, then the concept of survival of the fittest does not apply, since everybody survives and everybody is equally fit.
Species
species
The classification of species.
The haploid number of a non-human organism refers to the number of unique chromosomes present in its gametes. This number can vary widely among different species of plants and animals.
Distribution The region where an organism is found Abundance The number of individuals in an area The density
A dichotomous key is a special document that allows the reader to 'key out' an organism to some level, sometimes species, sometimes a level above species. Basically a key is a series of double statements. Each double statement has only one possible right answer; either the organism has some trait, or it doesn't. Depending on the answer, you are then taken to the next level of statements, each pair of statements whittles down the possible number of species that your organism could possibly be, and eventually lands you on the species, or genus that your organism is in.
there are eight ascospores formed in an ascus
Not necessarily. Organism size and chromosome count are not directly correlated. For example, while humans have 46 chromosomes, some plants can have hundreds of chromosomes and still be relatively small in size. The number of chromosomes can vary among different species and does not dictate the size of the organism.
Yes, all cells within an organism (excluding gametes) typically have the same number of chromosomes, known as the diploid number. This number is characteristic of the species and remains constant throughout most of the organism's cells. Gametes, such as sperm and eggs, have half the number of chromosomes (haploid) to ensure the correct chromosome count is restored upon fertilization.
Any large number of some type of living organism is called a specie. They tend to stay together in a group. Examples: humans.
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