A new species, ________, was recently shown to have two membranes, like a Gram-negative bacterium, but be phylogenetically related to the Gram-positive family Veillonellaceae.
Fill in the blank(s) with the appropriate word(s).
Negativicoccus
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In __________, one of the sperm cells in the pollen tube fertilizes the egg, forming a zygote; the other
fuses with the endosperm mother cell and gives rise to __________. Fill in the blank(s) with the appropriate word(s).
If excessive growth hormone secretion occurs during adulthood, the result is called ____.
A. Laron syndrome B. gigantism C. dwarfism D. acromegaly E. rhGH
A diploid cell with 4 chromosomes would produce which of the following after meiosis?
a)Two genetically-distinct types of haploid gametes b)Two genetically-distinct types of diploid gametes c)Four genetically-distinct types of haploid gametes d)Four genetically-distinct types of diploid gametes e)Four genetically-identical diploid gametes
The pufferfish, Fugu rubripes, has a genome that is one-tenth the size of mammalian genomes. Which of the following statements is not a possible reason for this size difference?
(a) Intron sequences in Fugu are shorter than those in mammals. (b) Fugu lacks the repetitive DNA found in mammals. (c) The Fugu genome seems to have lost sequences faster than it has gained sequences over evolutionary time. (d) Fugu has lost many genes that are part of gene families.