Most invertebrates, such as the annelid, have nephridia.
Answer the following statement true (T) or false (F)
True
Most invertebrates, such as the annelid, have nephridia.
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How do mitosis and meiosis differ from each other?
A) The goal of mitosis is to produce cells that are genetically identical to the original parent cell; the goal of meiosis is to produce cells that contain twice the number of chromosomes as the original parent cell. B) The cells formed by mitosis are diploid; the cells formed by meiosis are haploid. C) Mitosis results in the production of gametes; meiosis results in the production of cells, which are used for the organism's growth and replacement of damaged cells. D) Synapsis and crossing over occur in mitosis to ensure new combinations of genetic material; synapsis and crossing over do not occur in meiosis.
Many flowering plants coevolve with specific pollinators. The Madagascar orchid has a 12-inch floral tube and is a reliable nectar source for the hawkmoth, which has a correspondingly long proboscis (tongue)
Which statement most accurately describes how coevolution might have occurred for the hawkmoth and Madagascar orchid shown here? A) The hawkmoths that expended the most effort to reach the nectar would be the most fit, and pass the longer tongue phenotype to their offspring. B) Natural selection would favor orchids with nectar tubes just long enough to for an insect with pollen to make contact. Hawkmoths whose tongue could reach the deep tubes would be more fit. C) Hawkmoths whose tongue was just long enough to obtain nectar, but not able to pick up pollen would become the most fit in the population. D) It is most likely that mutations that resulted in both the length of the orchid floral tube and the length of the hawkmoth tongue occurred abruptly and simultaneously.
You find a wormlike arthropod with a flattened body and carnivorous eating habits. It would most likely be identified as a ____.
A. crustacean B. millipede C. spider D. trilobite E. centipede
The genus Mycobacterium ________.
A. are strict anaerobes and catalase positive B. are strict anaerobes and catalase positive and have cell walls similar to Gram-negative bacteria C. stain acid-fast D. have cell walls similar to Gram-negative bacteria