The atomic number is the number of protons and the mass number is the number of protons+neutrons in the nucleus so number of neutrons = 155-55 = 100
500 because of the 10% rule when moving up in food chains, for example; patch of grass-200J rabbit eats some of it but doesn’t eat all - 150J the rabbit runs around for a bit and loses energy, the fox doesn’t eat all of the rabbit - 50J ( just a rough example may not be completely right but the concept of the rule is there and the energy).
Answer:
Interspecific competition is when different animals that live in the same geographic area (sympatric species) compete for the same set of resources, mostly food and space. ... This occurs when a species' survival or reproduction is suppressed because of the presence of a staunch competitor.
(See figure below, where meiosis I begins with a diploid (2n = 4<span>) cell and ends with </span>two<span> haploid (n = </span>2<span>) cells.) In humans (2n = </span>46<span>), who have 23 pairs of chromosomes, the number of chromosomes is reduced by half at the end of meiosis I (n = 23).</span>
