Which statement reflects a key concept about ecosystems?
a. Matter moves linearly through different systems, both abiotic and biotic, within an ecosystem.
b. There is a one-way flow of energy through the food webs of ecosystems.
c. Conservation should focus on the success and survival of individual species.
d. The abiotic environment does not influence the distribution and survival of particular organisms.
e. Heat energy can be used by organisms for their daily activities.
b
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Using Mendel's flower color (purple is dominant, white is recessive), if two heterozygous plants are crossed, what is the probability that the first two offspring will have purple flowers?
A. 1/2 B. 1/4 C. 6/4 D. 9/16 E. 1/16
Which of the following is an example of a vestigial structure?
a. wings on a pigeon b. wings on an insect c. wings on an ostrich d. wings on a bat
Solutions containing pure alcohol or water-alcohol mixtures are called aqueous.
a. true b. false
The process of meiosis
A) begins with haploid cells and ends with diploid cells. B) begins with haploid cells and ends with haploid cells. C) begins with diploid cells and ends with haploid cells. D) begins with diploid cells and ends with diploid cells.