Answer:
Egg and sperm cells have to have half the number of chromosomes as in body cells so when they combine to form a zygote, the zygote is diploid and has the correct number of chromosomes. This explanation describes why meiosis produces haploid cells.
Explanation:
Meiosis is a type of cell division in which four haploid cells are produced from a diploid parent cell having two copies of each chromosome, where the number of chromosomes in the parent cell is reduced to half by undergoing DNA replication and nuclear division. Diploid cell contains two copies of each chromosome, one inherited from mother and the other from father while haploid cell contains only one copy of each chromosome. Examples of diploid cells (somatic cells) are skin, blood, muscle cells etc. Eggs or ovum (female gametes) and sperm (male gametes) are haploid reproductive cells. If the total number of chromosomes in a diploid cell is represented as '2n', then the number of chromosomes in a haploid cell is 'n'. During the fertilization process in an organism, the correct number of chromosomes is restored when the haploid male and female gamete combined to form a single diploid zygote, which is the first developmental stage of an organism.
Answer:
i want to say B because they experiment and get multiple types of results
Answer: C) Populations have no effect on their environment.
Ecology is a branch of biology which deals with the relation of organisms with each other and with their surrounding environment. A population can have a negative or positive effect on the environment also, the environment can exert positive or negative effect on the organisms in an ecosystem.
Populations can have negative effects on their environment: Human population utilizes fossil fuels for transportation causing air pollution it is an example of negative effect on the environment.
Populations can affect the size of other populations: Increase in predator population restricts the growth of prey populations.
Populations can adapt to changes in the environment: Organisms undergo favorable adaptation in order to increase chances of survival against changing environment.
On considering the above points this can be concluded that populations have no effect on their environment would least likely show up in his notes.
Answer:
sun and electric heater
Explanation:
sun is the biggest source of heat energy
electric heater is also an example of heat energy as it warms us
