Answer:
Because each has got its own special body features
This might be more answerable if there were a picture to better describe the problem
Answer:
A fruit fly of 75h AEL is at larval stage.
Explanation:
The development of a Drosophilia starts from egg to larva to pupa then to adult. The full development at 25 degrees Celsius takes between 8.5 to 10 days. The higher the temperature, the faster the development of the Drosophilia.
The eggs hatch after 12-15 hours into larval stage which then lasts for 3-4 days(72-96 hours) then the pupal stage which also lasts for 3-4 days before it becomes a full adult.
Thus, 72 hours after egg laying would still be in larval stage. The larval stage ends after at leas 90 hours after egg laying.
Answer:
Singed bristles/vestigial wings and normal bristles/normal wings
Explanation:
The recombinant progeny might occur due to the crossing over of the homologous chromosomes in case of the linked genes. This progeny are different from their parent progeny.
The F1 offspring obtained from the given cross in the question results in the normal wings and normal bristles ( SsLl). This progeny was crossed with singed bristles and vestigial wings (ssll). The progeny obtained from their cross are 'Sl' and 'sL' ( parental type ) and SL' or 'sl' ( recombinant).
Thus, the correct answer is option (D).
Answer:
Years of pressure on remains sediments and plants.
Explanation:
Stage 1- Over millions of years, layer after layer sediments and other plants and bacteria were covered with soil.
Stage 2 - As they became buried ever deeper, heat and pressure began to rise.
Stage 3- The amount of pressure and the degree of heat, along with the type of biomass, determined if the material became oil or natural gas.