Dark-staining body in the cell nuclei of female mammals that contains a condensed, inactive X chromosome; named after its discoverer, Murray Barr.
What will be an ideal response?
Barr bodies
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Organisms such as oysters or fish that produce millions of eggs per year may be characterized as:
a. r-selected and having a type I survivorship curve. b. K-selected and having a type I survivorship curve. c. r-selected and having a type II survivorship curve. d. K-selected and having a type II survivorship curve. e. r-selected and having a type III survivorship curve.
What are the most important transformers of energy in ecosystems?
A. Secondary consumers B. Bacteria C. Detritivores D. Plants and algae E. Primary consumers
Bacterial chromosomes, unlike eukaryotic chromosomes, often consist of a single replicon.
Answer the following statement true (T) or false (F)
Which of the following animal phyla is distinguished by a lack of tissues?
A) Roundworms B) Annelids C) Echinoderms D) Sponges E) Flatworms