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Svetlanka [38]
3 years ago
15

6) African cichlids are a group of closely related fish species. There are at least 500 known species living in three small lake

s. Over time, specialized teeth and body colorations have evolved for each species in response to mutations and competition for food and mates. This change over time is an example of
A) coevolution.
B) adaptive radiation.
C) convergent evolution.
D) vestigial structures.
Biology
2 answers:
Contact [7]3 years ago
4 0

B) adaptive radiation

pogonyaev3 years ago
3 0
It's ADAPTIVE RADIATION because it is <span>the diversification of a group of organisms into forms filling different ecological niches.</span>
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as compared with the production of egg cells, sperm cell production A) involves a jellylike outer covering b) occurs at a slower
Bingel [31]

The correct answer is:  d) begins later in life

Eggs or female reproductive cells are formed well before birth in a huge number (primordial oocytes). But, the number of oocyte decreases after birth constantly (there are 2 million oocytes at birth and 40,000 of them in puberty). At menopause, no egg cells are left.

On the other hand, the first sperms are formed only from puberty, but the production of those cells never stops.

4 0
2 years ago
What proportion of emerging diseases is caused by zoonotic pathogens?
gogolik [260]

61% of emerging diseases is caused by zoonotic pathogens

Explanation:

Out of total emerging diseases zoonotic contributes 61%, that are originated from wildlife. The rate is increasing due to growth of human population, its mobility, frivolous, cultural and their socioeconomic purposes. Air is the major source for spread of infectious diseases. Zoonoses are generally caused by bacteria, viruses and pathogens that are blowout between animals and human beings. Modern zoonoses are Ebola virus and salmonella. One of such direct zoonoses is rabies, that is transformed directly from animal to human.

6 0
3 years ago
How does fertilization create genetically unique kids from the same two parents​
denis23 [38]

Answer:

fertilization is the process of fusion of gametes from two parents. gametes are produced as a result of meiosis in which crossing over and recombination produces new combinations of genes and sometimes mutations are also occur which also leads to development of unique characteristics.

this is the main reason that kids from same parents are genetically unique.

Explanation:

6 0
3 years ago
What refrigerant safety group classification has the highest flammability and the highest toxicity?
timama [110]

Answer;

-B3

Explanation;

Refrigerants are divided into two groups according to toxicity:

-Class A signifies refrigerants for which toxicity has not been identified at concentrations less than or  equal to 400 ppm;  and

-Class B signifies refrigerants for which there is evidence of toxicity at concentrations below 400 ppm.

They are also divided into three groups according to flammability:

-Class 1 indicates refrigerants that do not show flame propagation when tested in air at 21°C and 101  kPa;

-Class 2 indicates refrigerants having a lower flammability limit of more than 0.10 kg/m3  at 21°C and  101 kPa and a heat of combustion of less than 19 kJ/kg;

-Class 3 indicates refrigerants that are highly flammable as defined by a lower flammability limit of less  than or equal to 0.10 kg/m3  at 21°C and 101 kPa or a heat of combustion greater than or equal to 19  kJ/kg.

-Therefore; the answer for the above question would be Class B and class 3.

3 0
3 years ago
Read 2 more answers
How aquired traits and inherited traits simular
ohaa [14]

Hey there! Simply put, inherited traits come from an ancestor, and acquired are ones that are earned through adaption. Hopefully that makes sense. :)

6 0
3 years ago
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