The process by which eggs in a test tube are fertilized by sperm is called ________

Fill in the blank(s) with correct word


in vitro fertilization

Biology & Microbiology

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During a stressful interval, _____

A) thyroid-stimulating hormaon (TSH) stimulates the adrenal cortex and medulla to secrete acetylcholine B) the alpha cells of islets secrete insulin and simultaneously the beta cells of the islets secrete glucagon C) adrenocorticotropic hormone (ACTH) stimulates the adrenal cortex, and neurons of the sympathetic nervous system stimulate the adrenal medulla D) the posterior pituitary gland secretes more growth hormones E) the calcium levels in the blood are increased due to actions of two antagonistic hormones, epinephrine and norepinephrine

Biology & Microbiology

Electrons are shared in bonds called

a. covalent bonds. b. ionic bonds. c. polar bonds. d. nonpolar bonds. e. all of these except ionic bonds

Biology & Microbiology

If one of the n+1 gametes pictured on the previous slide developed into a sperm cell and fertilized a normal egg, which of the following is a possible outcome?

1.A triploid infant with three copies of each chromosome. 2.A mosaic tetraploid infant. 3.An infant with trisomy 8, 13, 18 or 21. 4.An autosomal monosomic infant boy.

Biology & Microbiology

________ form beneficial symbiotic relationships with plant roots

A) Basidiomycetes B) Glomeromycetes C) Chytrids D) Zygomycetes E) Ascomycetes

Biology & Microbiology