Connective tissue is unique because the cells secrete an extracellular ________ that can be semiliquid or hardened
Fill in the blank(s) with correct word
matrix
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How can the amebozoans, cercozoans, and radiolarians be distinguished from each other with microscopy if they all have pseudopodia?
A) Amebozoans have lobe-shaped pseudopodia, cercozoans and radiolarians both have threadlike pseudopodia, and radiolarians have radial symmetry. B) Amebozoans have lobe-shaped pseudopodia, and cercozoans are significantly smaller in size but contain threadlike pseudopodia just like radiolarians. C) Amebozoans have large pseudopodia, cercozoans have lobe-shaped pseudopodia, and radiolarians have radial threadlike pseudopodia. D) Amebozoans have multiple lobe-shaped pseudopodia, cercozoans have one or two threadlike pseudopodia, and radiolarians have multiple threadlike pseudopodia.
In exon shuffling, the duplicated or rearranged exons appear as new domains in different genes
Indicate whether the statement is true or false
Ancestors of the Galàpagos finches had two different types of seeds to eat on some islands. Some seeds were very small, and required small beaks to handle, other seeds were very large and required large strong beaks to crack. This led to among the Galàpagos finches.
A. disruptive selection B. stabilizing selection C. directional selection D. sexual selection E. artificial selection
What is the leading scientific hypothesis explaining how the endomembrane system of eukaryotic cells originated?
A) From the inward folding of the plasma membrane B) From engulfing prokaryotic cells C) From engulfing eukaryotic cells D) From the spontaneous coalescence of phospholipids