People who suffer from marfan syndrome have disproportionately long limbs, a weakened aorta, and poor eyesight. all of these characteristics are due to the production of abnormal connective tissue, resulting from a single defective gene. marfan syndrome is an example of

Which type of respiration takes place when there is no oxygen present

Read each description below and determine to which stage of sleep each pertains. then click and drag each box into the appropriate category below.

Parthenogenesis is a type of reproduction that does not require a mate. it’s rarely seen in birds and higher vertebrates. parthenogenesis involves the formation of a zygote. but this zygote is formed without fertilization. in parthenogenesis, in the absence of a male gamete, the ovum develops directly in the zygote.