Biology Questions
Explore questions in the Biology category that you can ask Spark.E!
most of the different_______first appeared during the Cambrian
Homologous characters can be used to reconstruct?
when you rotate the node, is the phylogeny changed or unchanged?
What type of homologous character can be used to resolve phylogenetic relationships?
what are the three terms to describe evolutionary relatedness?
What two species appeared during the Cambrian explosion?
lacewing species can only be differentiated from another by
Where were most fossils found for early lineages?
what is the Ka/Ks value for homo spaiens?
which kingdom would organism with chloroplast cells walls but no organ be classified
which substance would likely be in the cellular walls of organism chloroplast and tissue
type of protists used to produce bread and cheese
Swim bladders ___. A help bony fish maintain buoyancy B contain the gills C are present in both bony and cartilaginous fishes D are a component of the lateral line system E are required for fish to exchange gases with the surrounding waterj
The process that results in the formation of different cell types occurring through selective changes in genetic activity that causes some genes to be turned off, while others are turned on is called __________.fertilizationdevelopmentdifferentiationconception
What does the term tetrapod mean?A living a double life B apelike C having four feet D egg-laying E descended from fish
Sharks are a type of ___. A tunicate B bony fish C jawless fish D cartilaginous fish E lungfish
Twins that occur when blastomeres separate are calledblastulatory.fraternalmonozygotic.dizygotic.zygoblastic.
In ________, a sample of amniotic fluid is removed and the fetal cells it contains are analyzed.chorionic villus samplingthoracentesisamniocentesisamniosisparacentesis
________ is the medical specialty that focuses on postnatal development from infancy to adolescence.OrthopedicsPsychiatricsGeriatricsPediatricsObstetrics
Stretching of the cervix causes an increase in the blood levels ofoxytocin.relaxin.chorionic gonadotropin.progesterone.estrogen.