how do organism reroduce

Question 1

usefulness of reproduction

Answer 1

continuity of species
helps in evolution of species
create genetic variation

NOTE:not all variation are useful

Question 2

defiine chromosome

Answer 2

dna molecule that consist of genetic material

Question 3

types of reproduction

Answer 3

sexual
asexual

Question 3

fission

Answer 3

body divides in two or more daughter cell

Question 4

multiple fission

Answer 4

In multiple fission, the parent organism undergoes repeated nuclear divisions followed by cytoplasmic division, resulting in the formation of multiple daughter cells simultaneously.
ex-plasmodium

Question 4

budding

Answer 4

formation of bud on parent body
-hydra

in single cellular organism
-yeast

Question 4

binary fission(types)

Answer 4

longitudinal binary
-euglena
transverse
-parmoecium
irregular
-amoeba

Question 4

fragmentation

Answer 4

body breaks up in small pieces
ex-spirogyra

Question 5

regenration

Answer 5

planaria

Question 6

spore formation

Answer 6

In spore formation, single-celled organisms produce specialized reproductive cells called spores which are produce and kept in sporangium, which can develop into new individuals under favorable conditions.

Question 7

vegetative propogation

Answer 7

plants groow with the help of propagule(leaves,stem and roots)
not seeds

Question 8

natural vegetative propagation
by underground stem-
by roots-
by leaves-

Answer 8

-potato
-sweetpotato
–bryophyllum

Question 9

artificial veg pro
-stem cutting
-root cutting
-mound layering

Answer 9

-rose
-rasberry
-branch with leaves is bent into ground

Question 10

grafting

Answer 10

stem of one plant(scion)is cutted and attachedd tto root of another plant(stock)

Question 11

tissue culture

Answer 11

with the help of tissue

Question 12

define pollination

Answer 12

transfer of pollen grain from anther to stigma

Question 13

testes

Answer 13

production of sperm cells and the synthesis of male sex hormones, primarily testosterone.

Question 14

scrotum

Answer 14

protect testes

Question 15

epididymis

Answer 15

store sperm

Question 16

seminal vesicle
prostate gland

Answer 16

protect sperm from acidity

Question 17

ovary

Answer 17

production of female gamete
secretion of female hormone(estrogen, progesterone)

Question 18

ovulation

Answer 18

release of ovule from ovary

Question 19

fallopian tube(oviduct)

Answer 19

fertilization happens here

Question 20

uterus

Answer 20

ensure and support making of child

Question 21

from where foetus gets nutrition

Answer 21

from placenta

Question 22

bacterial disease

Answer 22

gonorrhoea
syphillis

Question 23

viral disease

Answer 23

aids
warts

Question 24

post fertilization
-ovary
-ovule

Answer 24

-fruit
-seed

Question 25

layer at the end of uterus

Answer 25

crevix