Both heredity and environmental risk factors come into play in the development of cancer.
Answer the following statement true (T) or false (F)
True
Although our understanding of cancer is incomplete, scientists know that both heredity and environmental risk factors play a role.
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Egg yolk and seed endosperm are examples of passive parental care
Indicate whether the statement is true or false.
Which of the following statements best describes ribozymes?
a. Ribozymes are proteins that aid in the production of ribosomes. b. Ribozymes are nucleic acids that produce ribose sugars. c. Ribozymes store enzymes in ribosomes. d. Ribozymes process RNA molecules in eukaryotes.
Which statement about hydrostatic skeletons is true?
A) Hydrostatic skeletons are nonflexible. B) Hydrostatic skeletons provide little support for muscle action. C) Hydrostatic skeletons produce rigid animals that maintain one shape. D) Hydrostatic skeletons can protect internal organs.
The Y chromosome is present in only one copy in males, and therefore most of the genes it contains are effectively haploid
Although there is recombination between the pseudoautosomal regions of the X and Y, there is not a homologous section for large parts of the Y chromosome. How are the male-specific genes prevented from accumulating mutations and becoming nonfunctional? What will be an ideal response?