1. Growth curve under ideal conditions: Exponential growth curve
This graph shows exponential growth, which only happens under ideal conditions with unlimited space, food and no predators . So the growth curve under ideal conditions is called an Exponential curve. It shows rapidly increasing population growth due to each generation producing more offspring. It is a J shaped curve
2. Growth curve under poor growing conditions: Logistic growth curve
When the number of individuals gets large enough, resources start to get used up, slowing the growth rate. Eventually, the growth rate will plateau, or level off, making an S-shaped curve. The population size at which it levels off, which represents the maximum population size a particular environment can support, is called the carrying capacity, or K. For animals, important resources include food, water, shelter, and nesting space. Limited quantities of these resources results in competition between members of the same population, or intraspecific competition (intra- = within; -specific = species).
Intraspecific competition for resources may not affect populations that are well below their carrying capacity—resources are plentiful and all individuals can obtain what they need. However, as population size increases, the competition intensifies. In addition, the accumulation of waste products can reduce an environment’s carrying capacity.
Be able to interpret growth curves for organisms grown under ideal conditions as well as those...
Why would photosynthetic rates of beech grown under shelterwood be higher than those of oak grown under patch harvest?
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I don't understand why it is C Commercial bananas are grown as a monoculture, with all banana plants cloned from one original banana plant. The commercial strains of bananas are seedless, so each new banana plant has to be manually planted from a cutting of an existing banana root. In the 1950s, the Gros Michel banana strain, the dominant export banana at that time, was destroyed by the fungus Fusarium oxysporum. A new Fusarium resistant variety, the Cavendish banana,...
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Exercise 1. Assuming no further physiological changes occur, calculate the daily (24 hour) carbon balance for leaves of the HL- and LL-grown plants under the following experimental conditions: 1A. Bright light treatment. Plants are kept at a light-level of 200 umol/m2/s for 2 hours, then switched to a light-level of 150°umol/ma/s for 10 hours, then switched back to a light-level of 200 μmol/㎡/s for 2 hours, and finally, left in darkness (0 μmol/m2/s) for 10 hours. This light regime simulates...
Thank you!! Question 59 1 pts Under experimental conditions, cells grown in a medium containing thymine would incorporate thymine into their DNA. If cells grown for a number of generations in a medium containing radioactive thymine were removed from this medium and allowed to replicate once using thymine that was not radioactive, what percent of these cells would now be radioactive? 100% 50% 0% 25%
Conditional mutations are those where the trait is seen only under certain conditions. In permissive conditions the mutant allele has wild-type functions and under restrictive conditions the mutant allele has defective functions. True False
15. What are the two primary factors that are needed for exponential growth? a. Ideal conditions and unlimited resources b. Interspecies competition and unlimited resources c. Energy flow and chemical recycling d. Intraspecies competition and limited resources