True or false: Competition can occur over resources such as space, mates, and nesting sites, not just over food

A. true
B. false


A

Biology & Microbiology

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Creighton and McClintock worked with _______ and their model system to show that homologous chromosomes physically exchange genetic information during crossing over

A. fruit flies B. peas C. corn D. tobacco

Biology & Microbiology

Which of the following is false? As a cell grows, its 

A. volume increases. B. surface area increases. C. surface-area-to-volume ratio increases. D. metabolic needs increase.

Biology & Microbiology

Which tissue can not divide to give rise to identical progeny in a plant that reproduces asexually?

A. root B. pollen grain C. stem D. leaf E. ovule

Biology & Microbiology

Mutations in the gene for troponin can result in the production of the troponin protein, which has varying affinities for Ca2+ ions. Suppose that in a muscle cell a mutant troponin is expressed that has such a high affinity for Ca2+ ions that once they

bind to troponin they cannot unbind. What will likely happen in this muscle cell? A) Myosin heads will not bind to actin after action potentials stop being received. B) Myosin heads will bind to actin after action potentials stop being received. C) Tropomyosin will not move to expose myosin binding sites. D) Cross-bridges will form between myosin and tropomyosin.

Biology & Microbiology