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Anna35 [415]
3 years ago
7

A scientific theory is a well-tested explanation for a wide range of observations or experimental results. A hypothesis is a pos

sible answer to a question. When does a hypothesis become a scientific theory?
Biology
2 answers:
Anton [14]3 years ago
7 0
After it is tested by multiple sources, with the same outcome
deff fn [24]3 years ago
6 0
A hypothesis becomes a scientific theory when it has been thoroughly tested, and when whoever made the hypothesis now has proof of why their hypothesis was correct/incorrect.
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When the northern hemisphere is having summer solstice what is happening in the southern hemisphere
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C. winter solstice because if the North is having summer, the south would be having the opposite due to the direction the earth is tilted in orbit
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3 years ago
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Genetic drift results in selection for individuals that are better adapted to their environments. True False
Harlamova29_29 [7]

Answer: False.

Genetic drift is a stochastic process that occurs randomly through time. It refers to random fluctuations in allele frequencies due to chance events (small population size).

Explanation: Factors that can affect genetic diversity are Genetic drift, mutation, selection, migration, non-random mating and recombination.

Of these factors, forces that majorly control the fate of genetic variation in populations are genetic drift and natural selection.

Genetic drift refers to random fluctuations in allele frequencies due to chance events (small population size).

Natural selection involves environmental conditions acting on wild plant or animal populations or species. Most fit in a selection refers to genotype or phenotype with greater average reproductive output over it's lifespan than other genotypes or phenotypes.

7 0
3 years ago
Describe the skeleton of a sponge
valina [46]
Some spicules are formed of the mineralized substances calcium carbonate and silica, while others are made of an organic substance called spongin. Sponginskeletons<span> were and are used as scrubbers in bathtubs, though they are fairly expensive. The ubiquitous bathtub accessory called a lufa is NOT a </span>sponge<span>, but a plant.</span>
7 0
3 years ago
Which of the following most significantly determines a community's access to potable water?
Solnce55 [7]

Answer:

<em>The correct option is B) the availability of money</em>

Explanation:

Potable water can be described as the water which is safe to drink. Nowadays, with the rapid industrialization progress, it is important to process water so that it can be used for human consumption. The processing of water to make it clean enough requires money. The more money a community will have, the more machinery and plants it will be able to set up for the processing of water.  

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3 years ago
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The two cells formed at the end of meiosis I have chromosomes that are
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The right answer is C.

Meiosis and fertilization contribute to the stability of the species.

Meiosis ensures the passage of the diploid phase to the haploid phase. It follows a phase of DNA replication and consists of two successive divisions, the second is not preceded by a duplication of DNA. These two divisions lead, from a diploid mother cell (2n chromosomes), to four haploid daughter cells, the gametes (n chromosomes).

Meiosis and fertilization are at the origin of genetic mixing.

During meiosis, intra- and interchromosomal mixing occurs (inducing a genetic diversity between the daughter cells, and they are systematically different from their mother cell).

*Intrachromosomal mixing, or crossing-over recombination, takes place between paired homologous chromosomes during the prophase of the first meiosis division;

*Interchromosomal mixing is due to the independent migration of the homologous chromosomes of each pair during anaphase of the first division. It therefore concerns chromosomes reworked by the intrachromosomal mixing that preceded it.

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3 years ago
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