All categories

3 years ago

Based on the information in the graph, what is the best conclusion to draw about Africa?

Biology

2 answers:

Alinara [238K]3 years ago

8 0

The appropriate answer is C. The birth rate is higher than the death rate. The graph shows that the population has been increasing since the 1950s. In order to have an increase in the population, the birth rate must be higher than the death rate.
The graph does not represent in any way the carrying capacity or the available resources of the continent. An increasing population over time would indicate that the fertility rate would be relatively high and not low.

12345 [234]3 years ago

3 0

The answer is C. The birth rate is higher than the death rate.

We can see in the graph that in Africa the birth rate is very high, it is expected that by the year 2050 in Africa there will be 2 billion people, which is more than 1000% of the people living in Africa today. This means that more people are born than those who die.

You might be interested in

1. In humans, the ability to sing well is dominant over the recessive trait of being a terrible

pickupchik [31]

The probability of Sean to both sing and dance well is 50%.

<h3>Explanation:</h3>

The gene that is dominant is expressed in phenotype of the individual and the genes are actually obtained from the parents.

Here two characters are mentioned which are singing and dancing.

The dominant character i.e able to sing is marked by gene S and the corresponding recessive allele is marked by gene s.

Similarly, the ability to dance is marked by gene D and recessive allele is marked by gene d.

So, the mother is heterozygous and she can sing well, but can't dance. So her genotype is Ssdd.

The father can't sing and is homozygous, so his genotype is ssDD.

Gametes from the mother is Sd and sd. While the gamete from the father is sD.

So the probabilities of the progenies are SsDd and ssDd.

So the probability of Sean to both sing and dance well is 50%.

4 0

4 years ago

When using the RDA as a guide for vitamin and mineral intake, the combined amount of those found in food and in supplements is u

Orlov [11]

Yes, when using the RDA as a guide for vitamin and mineral intake, the combined amount present in the food and supplements must be counted to determine the correct intake.

Explanation:

Both vitamins and minerals are micronutrients and are required by the body in limited amounts.

The RDA (recommended dietary allowance) should be based on the upper intake level which is the highest tolerable level of nutrient intake by an individual daily in the form of food, supplements, and water which will not lead to any adverse effects.

If the nutrient content in supplements is neglected, then the daily intake might exceed RDA and UL leading to conditions like hypervitaminosis .

8 0

3 years ago

How is enthalpy used to predict whether a reaction is endothermic or exothermic?

Radda [10]

Answer:

$329.48 KJ/mol$ heat is released by the combustion of $2 mol$ of methane

Explanation:

The value of enthalpy determines whether the reaction is exothermic or endothermic. If the enthalpy change is positive, then the reaction is endothermic (heat or energy released) and if the enthalpy change is negative then the reaction is exothermic (heat or energy absorbed).

$2CH_4(g)+4O_2(g) => 2CO_2(g)+4H_2O(g)$

$\Delta H \ reaction=[ 2(\Delta HfCO_2)+ 4(\Delta HfH_2O)]-[2(\Delta HfCH_4)+4(\Delta HfO_2)]$

= $2 ( -(393.5 KJ)/mol)-[2( -74.6 KJ/mol)+4(-241.82 KJ/mol)]$

$= -787 KJ/mol-[ -149.2 KJ/mol-967.28 KJ/mol]$

$= -787 KJ/mol+1116.48 KJ/mol$

$=329.48 KJ/mol$

In this question, the enthalpy of formation has positive value and hence the reaction is endothermic in which the heat is released.

3 0

3 years ago

Which statement describes a forest ecosystem that has not experienced any natural disasters in the past 100 years?

Natali5045456 [20]

Answer:

the correct answer would be C

Explanation:

sorry if im wrongggg

7 0

4 years ago

What is the role of ADH (antidiuretic hormone) in regulating salt and water concentrations in the blood?

Alisiya [41]

Right when there is not that a lot of water within the body, pituitary organ releases additional vasoconstrictor to resorb more water in the circulatory framework therefore the pee are targeted..but once there is additional water in body, less ADH can be discharged to resorb less water within the blood therefore it leads to a weaken pee.

So the answer you are looking for is B. It prompts the kidneys to reabsorb more water into the bloodstream to dilute the salts.

I hope this helps!

8 0

3 years ago

Read 2 more answers