Answer:
Both molecular and morphological comparisons among dugongs and proboscideans species should be conducted
Explanation:
From a molecular biology point of view, it is possible to compare the sequences of dugongs and proboscideans and thus observe the homology level between genes of interest, it in order to establish evolutionary relationships among species. Moroever, by mass spectrometry (MS), it is possible to compare proteins in fossils >1 million years, these comparisons may shed light on the evolutionary origin of one group
The answer is; A
The mutation occurs in the population at low rates. However, if these mutations are advantageous, they are maintained in the population and passed on to next generations. This way, the frequency of the mutated alleles increase with each generation. This is how gene change occurs and natural selection.
3 of the factors: A,B, and C
<u>A Size of molecules (this one)</u>
<u>B Lipid solubility of molecules (this one)</u>
<u>C Presence of transport channels (this one)</u>
D Presence of ATP inside the cell (this is the only one that would not affect it)
Answer:
1) abiotic synthesis of small organic molecules (monomers)
2) joining of monomers into polymers
3) packaging of these molecules into protobionts, droplets with membranes that maintained a distinct internal chemistry
4) origin of self-replicating molecules that eventually made inheritance possible
Explanation:
The basics would be that you'd need to find out if they could exchange genetic information. If not, they couldn't be considered part of one species. Set-up 2 artificial environments so both groups would produce pollen at the same time. Fertilise both plants with the other's pollen. Then fertilise the plants with pollen from their own group.
Count the number of offspring each plant produces.
If the plants which were fertilised by the opposite group produce offspring, they are of the same species. You can then take this further if they are of the same species by analysing if there is any difference between the number (and health) of offspring produced by the crossed progeny and by the pure progeny. You'd have to take into account that some of them would want to grow at different times, so a study of the progeny from their first sprout until death (whilst emulating the seasons in your ideal controlled environment). Their success could then be compared to that of the pure-bred individuals.
Make sure to repeat this a few times, or have a number of plants to make sure your results are accurate.
Or if you couldn't do the controlled environment thing, just keep some pollen one year and use it to fertilise the other group.
I'd also put a hypothesis in there somewhere too.
The independent variable would be the number of plants pollinated. The dependant variable would be the number of progeny (offspring) produced.
