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3 years ago

PLEASE HELP!!!!!!!!!!!

Biology

2 answers:

timama [110]3 years ago

7 0

In the nucleus I think

Butoxors [25]3 years ago

3 0

The answer to your question Nucleus the nucleus is the part of the cell that dna synthesis takes place

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Given a population that contains genetic variation, what is the correct sequence of the following events under the influence of

GuDViN [60]

Answer:

2. A change occurs in the environment.

4. Poorly adapted individuals have decreased survivorship.

1. Well-adapted individuals leave more offspring than do poorly adapted individuals.

3. Genetic frequencies within the population change.

Explanation:

The natural selection theory was developed by Darwin to explain how evolution occur within a population. The environment is in constant state of changes and always select for organisms that are better adapted to it.

Poorly adapted organisms gradually reduce from the population as a result of decreased survival while well-adapted individuals multiply and contribute more to successive generation.

Well-adapted individuals pass on the adaptive alleles to their offspring, eventually leading to a change in gene frequencies within the population.

Hence, the sequence of events is 2, 4, 1 and 3.

8 0

2 years ago

Did humans cause the drought in São Paulo?

Strike441 [17]

Answer:

São Paulo is a city in Brazil that faced the worst drought in Brazil in the last 100 years between 2014–17.

The reason of the drought was diminished rain falls from last three third consecutive year in the region. Humans were somewhere responsible for the drought and less rainfall because this was caused by expansion of deforestation into the Amazon basin. Deforestation disturbed the environmental cycle that caused less amount of rain in São Paulo, Brazil.

7 0

2 years ago

Can someone please help me on this all u have to do is search up on the internet and then put down 4 facts that are mentioned in

Yanka [14]

Literally do it urself LOL

6 0

2 years ago

Suppose a couple has come to see you to discuss the probability of their children having cystic fibrosis (CF). CF is known to be

m_a_m_a [10]

Answer:

The children that the couple may have a 25% chance of having cystic fibrosis and 75% chance of being carriers for the CF gene

Explanation:

We know that both parents are in the same situation. Let's start for example with the mother. She has one parent and one sibling with cystic fibrosis (CF). So, supposing that the allele of the gene that causes the disease is "f", as the disease is autosomal recessive, both, the parent and the sibling have the genotype ff.

Also, knowing that the other parent has a normal phenotype, but the sibling has CF, we deduce that the other parent of the mother must have a Ff.

So, despite the mother's phenotype is normal, her genotype is Ff (see the Punnett square 1) Couple's parents in the attached image). In other words, she is a carrier for the CF gene.

As the parents' situation is analogous, we can deduce that the father also has a genotype Ff and is also a carrier for the CF gene.

Now, if we look at the Punnett square for them (see the square 2) Couple in the attached image), we see that all their children will always have at least one copy of the CF allele, f.

More specifically, their children have 25% chance of having cystic fibrosis and 75% chance of having a normal phenotype but being carriers of the CF gene.

6 0

3 years ago

________ are generally considered the best indicators of the level of succession in an ecosystem. Explain how you got your answe

Reika [66]

Answer:

Plants are generally considered the best indicators of the level of succession in an ecosystem. Explain how you got your answer.

Explanation:

Plants are generally forms the basis of life in any environment, other organism strictly depends for survival and continuation of life as they are the only autotrophs in the food chain. The best indicator of the level of succession in an ecosystem remains the plant

8 0

2 years ago