Edouard van Beneden proposed that an egg and a sperm, each containing half the complement of chromosomes found in somatic cells, fuse to produce a single cell called a(n) ______. 

A. zygote
B. karyotype
C. embryo
D. oocyte


A. zygote

Biology & Microbiology

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If a 10% sugar solution is separated from a 20% sugar solution by a selectively permeable membrane, in which direction will there be a net movement of water? Explain.

What will be an ideal response?

Biology & Microbiology

Which of these can found in oak wood but not in pine wood?  

A.  secondary xylem B.  secondary phloem C.  vessel members D.  tracheids E.  ray cells

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Which of the following has flagella that wave back and forth?

A. Archaea B. Eukarya C. Bacteria

Biology & Microbiology

Sexual reproduction

A) results in new combinations of genetic traits. B) requires less tissue differentiation than asexual reproduction. C) produces genetic clones and requires less tissue differentiation than asexual reproduction. D) leads to uniform characteristics in a population. E) produces genetic clones.

Biology & Microbiology