When a population has inhabited an area for a long time and the population size has stabilized, then
A) the environmental resistance declines.
B) density-independent factors are involved.
C) the carrying capacity of the area has been reached.
D) predation decreases.
E) density dependence is clearly not involved in the population growth.
C
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Heart rate will increase in the presence of increased _____
A) low-density lipoproteins B) immunoglobulins C) erythropoietin D) epinephrine E) platelets
Protein coding genes are transcribed into
1.tRNAs. 2.rRNAs. 3.mRNAs. 4.DNA. 5.polypeptides.
Biotechnology includes all of the following except
A. modifying antibiotics with different chemical functional groups to increase their potency. B. using genetically-modified E. coli as a tool to detect cancer. C. using bacterial insecticidal proteins as a means to combat mosquitoes as disease vectors. D. using bacterial antifreeze proteins to protect crops from lethal frosts.
Which of the following is an example of a modified underground bud with fleshy leaves for storage?
a. onion b. white potato c. gladiolus d. ginger
e. strawberry