A disadvantage of being multi-cellular is how long it takes to reproduce. For single-celled organisms, it's sometimes as simple a splitting in two, but multi cellular organisms, like humans, have to wait 9 months until they see their child.
Another disadvantage is it take more energy to do things. Some bacteria have flagella that they move like a tail that drives them forward. Multi-cellular organisms have to intake calories that are burned when we move and we have to keep intaking them to perform tasks.
The model of urban growth that views the city as a series of somewhat circular zones occurring outward from its center is called the Concentric zone model.
The term Robert Park used to explain the back and forth communications between members of a crowd during unrest was Circular reaction
Choaocytes are responsible for generating water currents the faciliate gas exchange and nutrition
Answer:
Crossing over increases the genetic variation
Errors in crossover formation result in chromosomal rearrangements (duplications and deletions) and may also cause chromosome nondisjunction
Explanation:
Crossing over, also known as recombination, refers to the exchange of genetic material (DNA) between non-sister chromatids of homologous chromosomes during meiosis. Crossing over increases the genetic variation of the resulting gametes, allowing different genetic combinations to be passed from parents to offspring. Unequal crossing over is a type of error associated with chromosomal duplication and/or deletion events. Unequal crossing over occurs when homologous sequences are not paired precisely. Moreover, errors in crossing over may also cause chromosome nondisjunction, thereby leading to aneuploidies.
Answer:
In this case, the question asked is "To what lengths must we go to protect plants and animals?", which is not specific and cannot be used for scientific research.
The ecological researches for the safety of the environment involves the protection of the plants and the animals on the basis of their number and vulnerability to extinction. Almost all the length of the plants are ecologically important and can decrease in number due to the changes in the environment, the length is not a parameter to determine the protection boundary.
