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expeople1 [14]
3 years ago
12

"Since records began in 1958, the carbon dioxide concentration in the atmosphere has decreased."A. TrueB. False

Biology
1 answer:
4vir4ik [10]3 years ago
3 0

Answer:

False

Explanation:

Carbon dioxide is an important greenhouse gas found in the atmosphere. Since the start of the Industrial Revolution, record of the concentration of carbon dioxide in the atmosphere have been said to increase by more than about 45%. Recent records indicate concentration to be highest, of which has been linked to the cause of global warming and climate change.

Human activities such as burning of fossil fuels, bush burning, deforestation have lead to a remarkable increase in the concentration of carbon dioxide in the atmosphere.  

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In normal humans, sex cells contain the _________ number of chromosomes.
Nadya [2.5K]

Answer: Haploid number

In normal humans, sex cells contain the diploid number of chromosomes

Explanation;

Human somatic cells or body cells are diploid such that they contain two sets of 23 chromosomes which gives a total of 23 chromosomes. Examples of somatic cells in the body that are diploid include, epithelial cells, somatic cells, liver cells, blood cells, nerve cells, etc.

However, mature sex cells are haploid, which means they have one set of 23 chromosomes which means they have 23 chromosomes. Sex cells are the results of meiosis type of cell division in which a diploid cell divides to form four daughter cells that are haploid.

3 0
3 years ago
What is the basis for the delay between the atrial and ventricular contractions in a normal heart?
earnstyle [38]

The main responsible for the delay among the atrial and ventricular contractions is the action potential conduction velocity of the AV node cells. If the atria and ventricles contract simultaneously, atria cannot give any help in filling the ventricles, which is needed, especially in those with stiff ventricles as in the elderly. Hence atria have to contract first and then the ventricles.

5 0
4 years ago
Did the Florida Panther become endangered because of natural selection, genetic drift, or gene flow?
Natalija [7]

Answer:

ALL OF THE ABOVE

Explanation:

Genetic Drift are the changes in allele frequency of a population that result from RANDOM survival or reproduction of individuals with certain characteristics.  Survival or reproduction of those individuals in the face of some environmental change is a matter of LUCK or CHANCE, not because of their phenotype or genotype.

While in Natural selection, the environmental events that affect a population are likely random, but the survival or reproduction of the individuals depends on their phenotypes and genotypes.

Meanwhile, Gene flow is the movement of genes into or out of a population. Low gen flow can lead to low genetic diversity.

Low population which can cause low genetic diversity, poor habitat conditions and habitat loss, road deaths, and commercial development in panther range are constant threats to the Florida Panther's survival.

All these causes are related and therefore affects the Florida Panther.

7 0
3 years ago
What is the purpose of the fruit that develops on a plant
Natali [406]
To grow food to grow food
5 0
3 years ago
Which institution is most likely to utilize competence admission
muminat
I think it is the kamineni institute of medical sciences (KIMS)


Hope my answer would be helpful to you
4 0
3 years ago
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