The blank could be filled in with humerus since it is the longest bone in the leg.
Answer:
A diploid plant (sporophyte) produces, by meiosis, a spore that gives rise to a multicellular, haploid pollen grain (gametophyte).
Explanation:
Alternation of generation is a process that occurs in plants and refers to change from sexual haploid to asexual diploid stages and vice versa.
Gametophyte is haploid stage ( n chromosomes), alternates with a sporophyte, which is diploid ( 2n chromosomes). A mature sporophyte produces spores by meiosis, (reduction cell division) which reduces the number of chromosomes to half, from 2n to n (diploid to haploid).
Answer:
D. Take many thousands of years to form
Explanation:
James Hutton discovered thin layers of sediments on his flooded farm and he concluded that strata was part of the earth surface in the past and thus takes many thousands of years to form.
This led to the principle of uniformitarianism which states that the geologic processes now are the same with the ones in the past.
During an experiment the factors we observe are
1) what reactions are taking place(if any)
2) is there a change in the colour of the substances used
and so on. Observation totally depends on the experiment
the things we measure are weight, mass, time, temperature,etc.
hope it helps u