In insects, primary symbionts are ________, while secondary symbionts ________
A) heritable / are transmitted horizontally
B) able to replicate outside of the host / are obligate symbionts
C) required for host reproduction / are not required for host reproduction
D) obligate symbionts / have a free-living replicative stage
Answer: C
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The cells of triploid animals, like certain salamanders, are individually larger, yet their overall body size is no different from that of diploids. Pose a developmental hypothesis for the control of morphogenesis in such animals
What will be an ideal response?
Most changes to the universal genetic code
a. require corresponding mutations in rRNAs. b. are to allow encoding of more than twenty amino acids. c. occur in nuclear genomes. d. occur in yeast species. e. affect termination codons if in the nuclear genome.
Answer the following questions true (T) or false (F)
1. A relatively early hominin with advanced tool technology was Homo ergaster. 2. The brain of Australopithecus afarensis was almost the same size as that of modern humans. 3. Australopithecus afarensis represents a hominin with both ape-like and human-like characteristics.
What is nutritional immunity?
a. acquired resistance to food-borne allergens b. withholding of nutrients necessary for pathogen replication c. the relationship between the efficacy of the immune system versus food intake d. the body’s ability to protect itself from infection by digesting pathogens