NCERT

Question 1

life span

Answer 1

period form birth to natural death

Question 2

immortal organism

Answer 2

unicellular organisms

Question 3

there is a cycle of ___ ___ and ___

Answer 3

birth
growth
death

Question 4

factors responsible for type of reproduction

Answer 4

organism’s habitat
internal physiology

Question 5

clone

Answer 5

exact copy of parent

Question 6

most invasive weed

Answer 6

water hyacinth

Question 7

before the onset of adverse conditions in simple organisms like fungi and algae

Answer 7

shift to sexual reproduction method

Question 8

mode of reproduction in higher plants

Answer 8

vegetative and sexual reproduction

Question 9

juvenile phase
its name in plants

Answer 9

stage of growth
vegetative phase

Question 10

end of ___ phase marks the beginning of ___ phase

Answer 10

juvenile
reproductive

Question 11

how do you know reproductive phase started in plants

Answer 11

flowers appear

Question 12

in ___ species it is difficult to clearly define the vegetative reproductive senescent phases

Answer 12

perennial

Question 13

bamboo flowering

Answer 13

takes 50 to 100 years

Question 14

neelakuranji flowering
scientific name
last flowered year and loc

Answer 14

once in 12 years
strobilanthus kunthiana
sept-oct 2003, kerala karnataka tamil nadu

Question 15

cyclic changes during reproduction

Answer 15

oestrus cycle
menstrual cycle in primates

Question 16

oestrus cycle

Answer 16

cyclical changes in the activities of ovaries and accessory ducts and hormones during reproductive phase

Question 17

in animals, the ___ phase is followed by __ and ___ changes prior to ___ phase

Answer 17

juvenile phase
physiological and morphological
reproductive phase

Question 18

seasonal breeders and continuous breeders

Answer 18

seasonal breeders - exhibit oestrus cycle during favorable seasons

continuous breeders - reproductively active throughout the reproductive phase

Question 19

end of reproductive phase is the parameters of

Answer 19

senescence or old age

Question 20

___ are responsible for the transition btw the three phases

Answer 20

hormones

Question 21

pre fertilization events

Answer 21

gametogenesis
gamete transfer

Question 22

homogametes?
other name?

Answer 22

identical male and female gametes
isogametes

Question 23

types of heterogametes

Answer 23

male gamete - antherozoid or sperm
female gamete - egg or ovum

Question 24

unisexual and bisexual?
other names?

Answer 24

unisexual - has either male or female reproductive part
homothallic, dioecious, hermaphrodite

bisexual - bothe male and female reproductive parts are present
heterothallic, monoecious

Question 25

unisexual male flower
unisexual female flower

Answer 25

staminate
pistillate

Question 26

monoecious eg
dioecious eg

Answer 26

cucurbits and coconut
papaya, date palm and pea

Question 27

hermaphrodites eg
unisexual animals eg

Answer 27

earthworm, sponge, tapeworm, leech

cockroach

Question 28

haploid parent produces gametes by ___ division

Answer 28

mitotic

Question 29

haploid plant body eg

Answer 29

monera fungi algae bryophytes

Question 30

in diploid organisms, specialized cells called ___ undergo meiosis to form gametes

Answer 30

meiocytes (gamete mother cell)

Question 31

eg of organisms in which both male and female gametes are motile

Answer 31

few algae and fungi

Question 32

fertilization also called

Answer 32

syngamy

Question 33

syngamy results in the formation of

Answer 33

zygote

Question 34

parthenogenesis?
eg?

Answer 34

new organism forms without fertilization

rotifers
honeybee
some lizards
turkey

Question 35

external fertilization

Answer 35

fertilization outside the body in an external medium

algae fishes ambhibians

Question 36

internal fertilization
eg

Answer 36

fertilization inside the female body

fungi reptiles birds mammals bryophytes pteridophytes gymnosperms angiosperms

Question 37

fate of zygote with haplontic life cylce

Answer 37

zygote divides by meiosis to form haploid spores that grow into haploid individuals

Question 38

post fertilization events

Answer 38

zygote formation
enbryogenesis