What is the name of the membranous structure that compartmentalizes the cytoplasm of eukaryotic organisms?
A) ribosome
B) mitochondria
C) nucleoid
D) cytosol
E) endoplasmic reticulum
E
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In some male songbirds, long winter nights lead to an increase in melatonin secretion. The rise in melatonin indirectly prevents singing and other courtship behaviors by slowing secretion of which hormone?
a. testosterone b. estrogen c. thyroid hormone d. follicle stimulating hormone e. growth hormone
Fungi and animals share a more recent common ancestor than do fungi and plants.
Answer the following statement true (T) or false (F)
There are more species of _____________ than there are species of plants.
a) fish b) flies c) beetles d) bees e) mammals
Arrange the steps in the process of constructing a phylogenetic tree using the distance method in the correct order
i. A distance matrix is created. ii. A tree is constructed which arranges segments or branches derived from pair-wise distance comparisons. iii. The distance between species is measured using character state changes. iv. Phylogenetic inference software is used to choose the best tree. a. i, ii, iii, iv c. iii, i, ii, iv b. ii, iii, iv, i d. iv, iii, ii, i