Answer:
B. The burning of fossil fuels released greenhouse gases into the atmosphere causing the planet to get warm.
Explanation:
In the apple maggot fly, the frequency of certain alleles increases steadily as one goes from North to South. This is an example of: Sympatric speciation.
Sympatric speciation is observed when there are no physical barriers which prevent any members of a species from mating with another, and all members are in close contact to one another. A new species, possibly established on a distinct food source or trait seems to develop instinctively.
The example of apple maggot fly supports a model for sympatric speciation in progress. Hawthorn is the native host for the apple maggot fly in North America. However, in the mid-1800s, a new population developed on introduced, domesticated apple.
To learn more about Sympatric speciation here
brainly.com/question/4493180
#SPJ4
Answer:
The starting materials needed for the process of cellular respiration are glucose and oxygen.
Hope I helped! ☺
Answer:
Alleles are recombined when gametes from different parents join together.
Explanation:
Genetic variation is increased by sexual reproduction in 3 main ways
1. Random mating - individual organisms reproduce with each other at random, meaning new combinations of DNA come together when fertilization occurs
2. Crossing over - during meiosis, when homologous chromosomes align, they can exchange genetic material by a process called crossing over, or homologous recombination. This means the alleles on each homologous chromosome are reshuffled, creating new combinations.
3. Independent assortment - When gametes are formed, a diploid cell duplicates its DNA and forms 4 haploid cells. Each of the homologous pair of chromosomes in the diploid align in the centre of the cell to be split into the gametes at each division. The orientation at which they line up is random, so every gamete gets a different selection of chromosomes (which themselves have been shuffled bt crossing over).
Only the 1st option (Alleles are recombined when gametes from different parents join together.) is correct. This represents the process of random mating, where new combinations of alleles are formed during fertilization between two individuals.
