The action that may increase the flask's carrying capacity for rotifers would be to decrease the number of microorganisms in the flask.
<h3>Carrying capacity</h3>
The carrying capacity of an environment refers to the maximum number of organisms of a particular species that the environment can support based on the resources it has.
Rotifers and microbes growing in the flask mean that both species would have to compete for the resources present in the flask. This competition will limit the reproductive capacity of each species.
As the population of the species decreases, the growth of the other is favored due to less competition.
With rotifers growing alone in the flask, there would be less competition for resources and more population growth.
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Answer: The father determines the biological sex of a baby
Explanation: Human beings have two sex chromosomes, males have XY chromosomes whereas females have XX chromosomes. During fertilization, an egg from a woman fuses with a sperm cell from a man to form a zygote. Women have two X chromosomes (XX) and any point in time they can only release an egg bearing an X chromosome but males have one X and one Y chromosome, therefore they can either release a sperm cell with an X chromosome or a sperm cell with a Y chromosome. When an egg with X-chromosome fuses with a sperm cell with an X chromosome, the resulting baby is a female but when an egg with an X chromosome fuses with a sperm cell with a Y chromosome, the resulting baby is a male.
What makes the difference in both sexes is the Y chromosome from the man, therefore the father determines the biological sex of a baby.
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<span>Nerve cells of medusa are specifically organised into <span>a "nerve net" which is a loose network of nerves, located in the epidermis. The nerve net is the simplest form of a nervous system which allows organisms to respond to physical contact. Medusa detects various stimuli including the touch of other animals via this nerve net. Medusa is then capable to respond to its environment, cannot detect the source of the stimulus.</span></span>