1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Debora [2.8K]
3 years ago
9

Total human population growth has continued to increase in recent years, but some countries around the globe are actually decrea

sing in population. According to the United Nations, for example, the population of the country of Italy is expected to decline from over 57 million in 2003 to about 55 milllion in 2020. Which of these is probably the BEST reason for this predicted decline in the size of Italy's population?
A) Many of the younger married couples in Italy are deciding to have less children.

B) Widespread famine caused by falling food production will result in a smaller population.

C) Italy is experiencing a massive emigration as people move away in search of jobs and better living conditions.

D) Increasing rates of disease and illness have caused more deaths to occur, which will result in a declining population.
Biology
1 answer:
GarryVolchara [31]3 years ago
7 0

Answer:

The correct option is A) Many of the younger married couples in Italy are deciding to have less children.

Explanation:

As we know the birth rate of a country should be equal to the death rate of the country in order to maintain a stable economy. In the past, people were not concerned about the rising population and hence did not look upon child birth rate. But nowadays, the younger population is more concerned about the rising population and hence tends to take more steps to control the population.

You might be interested in
Exercises including jumping, skipping, and calisthenics (such as those used in a warm-up) are called _______________ exercises.
Marianna [84]
<span>Exercises including jumping, skipping, and calisthenics (such as those used in a warm-up) are called dynamic movement exercises.
These exercises are related to joints and we mostly perform these exercises for the activities that needs strength and speed. We see athletics doing warm up exercises before they are going to start their race or any game.</span>
5 0
3 years ago
A population _____ follows a period of _____. decline; overshoot increase; overshoot increase; scarcity scarcity; dieback
Anna11 [10]

Answer:

Hey there!

A population increase follows a period of scarcity.

With more people, the food and water resources get scarce, and isn't always enough for everyone.

Let me know if this helps :)

5 0
3 years ago
Read 2 more answers
Saliva is a ______ _______ which contains the enzyme salivary amylase.
Andreyy89

Answer:

Saliva contains the enzyme amylase, also called ptyalin, which is capable of breaking down starch into simpler sugars such as maltose and dextrin that can be further broken down in the small intestine. About 30% of starch digestion takes place in the mouth cavity.

6 0
3 years ago
Read 2 more answers
In most natural populations rapid exponential growth is unsustainable. As populations
adell [148]
Answer:
Carrying capacity is defined a the ability of the natural ecosystem to take care of the environment which does not necessarily cause the resistance in population increase.
Explanation:
The earth indeed has a mechanism of delivering changes to the system and keeping it intact but as the case of the rapid growth of population arises the mother nature sees this as an exponent of unsustainable growth as the resource used to sustain large populations is no longer available or are exhausted.
A population increase so does the carrying capacity and workload of the natural environment which at the time gets slow due either due to the man's artificial technology or the natural process like hurricane or earthquake itself.
But seeing the nature as providing possibilities for the existence of the societies throughout ages and hence trying to maintain its originality may break those activities that it considers resistance as several biotic factors like predators, disease, competition, and lack of food.
7 0
3 years ago
In a diploid species of plant, the genes for plant height and fruit shape are syntenic and separated by 18 m.u. Allele D produce
FinnZ [79.3K]

Answer:

C)Parental: 41% Dr, 41% dR; recombinant: 9% DR, 9% dr.

Explanation:

The notation Dr/dR for genotypes means that one homologous chromosome has the alleles Dr and the other homologous chromosome has the alleles dR.

The heterozygous plant  Dr/dR will produce 4 types of gametes: two identical to the chromosmes the individual has in its somatic cells (called parental), and two gametes which will be a mix of the alleles in the homologous chromosomes (called recombinant).

  • Dr: parental
  • dR: parental
  • DR: recombinant
  • dr: recombinant

To calculate the frequency of each type of gamete, we must use the formula:

Distance (map units) / 100 = frequency of recombination.

18 mu / 100 = 0.18.

The total frequency of recombination between the genes D and R is 0.18, but every time crossing over happens, two recombinant gametes are generated. Therefore, each recombinant gamete will have a frequency of 0.18/2=0.09 = 9%.

The frequency of parental gametes will be:

1 - frequency of recombinant gametes

1 - 0.18 = 0.82

But there are 2 parental gametes, so each of them will have a frequency of 0.82/2=0.41 = 41%.

6 0
3 years ago
Other questions:
  • What is free energy?
    6·2 answers
  • If the sequences of bases of one strand of a DNA molecule is TAGTCA, what is the sequence of complementary bases in the other st
    14·1 answer
  • Average lifespan of a person?
    14·2 answers
  • Organisms are______ by how they get energy
    11·1 answer
  • If you wanted to increase the rate of photosynthesis in a plant, you would develop a plant with which of the following character
    5·2 answers
  • Imagine that a couple is planning to have children. The male is heterozygous for tongue rolling and homozygous dominant for unat
    13·1 answer
  • Consider the diagram of the basic structure of a bacterium.
    12·2 answers
  • Complete the sentence to describe what a wave is and what it does.
    9·1 answer
  • Mendel bred a purple-flowered pea plant with a white-flowered pea plant and found that all the offspring had purple flowers. But
    10·1 answer
  • In the name staphylococcus aureus, staphylococcus is the ?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!