reproduction

the phrases below describe several events that occur during the process of mitosis
(a) attachment of double stranded chromosomes to the spindle apparatus
(b) formation of single-stranded chromosomes which are moved to opposite ends of the cell
(c) disintegration of the nuclear membrane
(d) nuclear membrane formation around each set of chromosomes, forming two nuclei
(e) synthesis of a spindle apparatus
 which sequence represents the correct order of these events?

• a,b,c,d,e
• b,d,a,c,e
• a,d,e,b,c
• c,e,a,b,d

asexual reproduction of a diploid organisms normally result n new organisms that contain cells with

• more chromosomes that are found in the cells of the parent
• the 2n number of chromosomes
• the n number of chromosomes 
• fewer chromosomes than found in the cells of the parent

the bacterium clostridum tetani is found on nearly two of these surfaces. a short time after one or two of these bacteria enter a wound, a large number of them may be found in the wound as a result of 

• regeneration
• propagation
• asexual reproduction
• gametogenesis

male and female reproductive cells develop in specialized organs known as

• gonads
• gametes
• lymph glands
• excretory glands

in human females, how many egg cells are formed as a result of one primary sex cells undergoing normal meiotic cell division?

• 1
• 2
• 3
• 4

which diagram correctly represents a step in the normal process of human reproduction?

• 2n+2n=n
• n+n=2n
• 2n+n=3n
• 2n+2n=4n

a lizard can secape from a predator by losing its tail when caught. often the lizards tail is replaced by the process

• grafting 
• sporulation
• gametogenesis
• regeneration

which two processes are involved in mitotic cell division  

• nuclear duplication and cytoplasmic division
• nuclear duplication and cytoplasmic duplication
• spermatogenesis and cytoplasmic duplication
• oogenesis and cytoplasmic divis

the chromatids of a double stranded chromosome are held together at a region known as 

• polar body
• centromere
• diploid
• centriole

which is a true statement about normal diploid cells

• they contain only one chromosomes of each homologous pair
• they contain only half the the number of chromosomes that a re in a gamete
• they contain homologous pairs of chromosomes
• they contain chromosomes that are all of equal lenght