June Bridals bohemian items for the maid of the brides

2017 NECO BIOLOGY (ESSAY) ANSWERS
1ai.Homeostasis can be defined as a property of an organism
or system that helps it maintain its parameters within a
normal range of values
ii. 1.Auxin
2.Ethylene
iii. Euglena as plant
1.It contains chloroplasts in its cytoplasm
2. It is able to produce its own food by photosynthesis when
light is available
Euglena as animal:
1. It can actually move as it has a flagellum. Movement is
usually associated with animals.
2. It feeds on food whenever it needs to feed by engulfing the
food with its body as our phagocytes do when the sunlight is
not available.
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2a)I)Beak-sharpandcurvedforcatchingpreyandtearingflesh
-short,bluntandstrongforscratching-
short,bluntandstrongforscratchinggroundforfood.
II)Crop-temporaryfoodstorage
-housebacteriawhichmoistensandfermentsfood-housebacteriawhichmoistensandfermentsfoodparticles June Bridals bohemian items for the maid of the brides
III)Gizzard-groundingoffood
-
IV)Liver-secretionofbile
-regulationoflipids.
B)I)
II)-Diuresis
-kidneystones
-nephritis
-dropsy.
III)-theymedicaljournals
-theyprovidedrugandvaccinesincaseofemergency
-theysetinternationalquarantineregulations
-theygivewarningincaseofepidermicdiseaseoutbreak.
-theyaidinmotherandchildhealthcar-
theyaidinmotherandchildhealthcare
-theysetanddeterminesafestandard-
theysetanddeterminesafestandardsfordrugs.
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3ai) Enzyme : Proteins that speeds up the rate of a chemical
reaction in a living organism. An enzyme acts as catalyst for
specific chemical reactions, converting a specific set of
reactants (called substrates) into specific products. Without
enzymes , life as we know it would not exist.
II) cyclosis: the circulation of cytoplasm or cell
organelles, such as food vacuoles in some protozoans
III) peristalsis: the progressive wave of contraction and
relaxation of a tubular muscular system, especially the
alimentary canal, by which the contents are forced through
the system.
3bii) The dental formula for different species are as follows
where I = incisors, C = canines, P = premolars and M = molars
:
Man (adult)
I - 2/2 C - 1/1 P - 2/2 M - 3/3 = 16 x 2 = 32
3cii) Main Functions Of Amniotic Fluid
Provides Mechanical Protection : One of the main functions of
amniotic fluid is to prevent mechanical trauma to the fetus. It
keeps the growing fetus encased safely, acting as a shock
absorber of sorts. Amniotic fluid provides a well-lubricated
environment for the fetus to move around in, thereby helping
in bone growth and strengthening.
Allows Development of Body Parts: Amniotic fluid circulates
freely within the womb, keeping every part of the body
lubricated. That allows for the growth of the external body
parts such as fingers and toes and stops them from
becoming clumped together. It also helps in the development
of the lungs and the digestive system.
Offers A Natural Immune System : Amniotic fluid is a
significant player in the baby’s natural immune system. Many
of the antimicrobial substances that make up the natural
immune system of the baby can be found in amniotic fluid.
These antimicrobials protect the baby from various bacteria,
fungi, protozoa, and viruses
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4ai)
Decomposers are organism that break down complex organic
molecules in dead plant and animal materials in stage, into
simple organic molecules and finally into inorganic
substances
4aii)
Habitat is a kind of place where an organism lives in nature
4aiii)
Mutation is a permanent change in DNA structure that may
alter or destroy a given character or give rise to a new
character
4bi)
i)For torism
ii)For source of foreign exchange
iii)For source of energy
4bii)
i)Fission
ii)Budding
iii)Fragmentation
4biii)
Functions of blood
i)Transportation of digested food substance
ii)Transports oxygen
iii)Transports excretory products
iv)Distributes heat and equalizes body temperature
v)destroys bacteria through blood corpuscles
4biv)
TABULATE
SEXUAL REPRODUCTION
i)often two parents needed
ii)Gametes produced
iii)Offsprings show new variation
ASEXUAL REPRODUCTION
i)only one parent needed
ii)No gametes
iii)Offsprings identical
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5ai)
Primary successionis the colonization of new sites by
communities of organisms. It often occurs after a
devastating event has wiped out the organisms that lived in
the area, or with the creation of a new habitat.
5aii)
primary root is the first root produced by a germinating
seed, developing from the radicle of the embryo.
5aiii)
macroNutrients are environmental substances used for
energy, growth, and bodily functions by organisms.
Depending on the nutrient, these substances are needed in
small amounts or larger amounts.
5bi)
i)Airway diseases
ii)Lung tissue diseases
iii)Lung circulation diseases
5bii)
i)By Sterlization It destructs pathogens in medical and lab
rooms.
ii)By disinfectants but they are not suitable for human skin
like phenyl
iii)By antiseptic They can be used on human skin like iodine
iv)By use of sanitizers We can use sanitizers like dettol to
wash off pathogens from our hand
5biii)
i)It provides basis of evolution
ii)It helps in maintaining life even in adverse conditions
iii)It helps the organisms survive in changed climatic
conditions.
5c)
After the seed has made it to a new location and is covered
with dirt, it can begin germination.Germinationis the
process of seeds developing into new plants. First,
environmental conditions must trigger the seed to grow.
Usually, this is determined by how deep the seed is planted,
water availability, and temperature. When water is plentiful,
the seed fills with water in a process calledimbibition. The
water activates special proteins, calledenzymes, that begin
the process of seed growth. First the seed grows arootto
access water underground. Next, theshoots, or growth
above ground, begin to appear. The seed sends a shoot
towards the surface, where it will growleavesto harvest
energy from the sun.
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