Sun 02 Sep 2018
II - Ovule
III - Ovary
Iv - Filament
Vi - Stigma
Female reproductive organ of a flower.
I - It attracts insects for pollution.
II - It produces the seeds.
V - It produces the pollen grains.
VI - It receives the pollen grains for pollination to take place.
E - Marginal placentation
F - Axile placentation
G - Parietal placentation
H - Free central placentation.
E - They are arranged in a single row.
F - They are divided into chambers.
G - The placenta occurs at the edge.
H - The placenta occurs freely in the centre.
E - Delonix Regia.
F - Tomato.
G - Paw-Paw
H - coconut
A - Male
B - female
A - Because E is a sperm cell from A
B - Because D is an egg(ovum) from B
The letter X between diagram A and B
represent mating (cross breeding)
I - Testis
II - Sperm Cell
III - Union
IV - Zygote
I - Because it where sperm Cell are formed
II - Because it has head and tail region for movement
III - Because the sperm and egg fuse together
IV - It is the product of the union
The process is meiotic division
The reproductive organ (Scrotum)
The reproductive organ (Ovary)
The animal A and B that shows dominant character for skin colour is A
Because all the Fi generation where hetrozygote skin colours of A.
The genotype of animal A is BB while the genotype of animal B is bb.
(ii) The phenotypic ratio of Fi generation is 4:0
Vertical section of a human skin
I - Hair shaft
II - sebaceous gland
III - erector muscle
IV - Sweat pore
V - Sweat gland
VI - Blood capillary
VII - Fat
VIII - cold sense receptor
IX - Dermis
X - Epidermis
(i) For Excretion
(ii) Maintenance of a suitable constant body temperature
(iii) Storage of reserved food
(iv) For reception of external stimuli
(i) Low - It assumes an erect position.
(ii) High - It falls nearly flat on the skin.
II: Secretes oily substance that lubricates the skin.
III: Controls the movement of hairs.
V: Thermo regulation.
VI: Transfers oxygen and nutrients to the skin.
VIII: Responsible for sensitivity of the skin to light.
X: Provides a water proof barrier and creates our skin tone.
-Sweating and cooling
-Erector muscle contract
-Skin assume erect position
-Bathing with soap and water
-Exposure to fresh air
-Exposure to sunlight
-Check up on disease break out