Earlyface

Sandy soil, as its description suggests, has a relatively large amount of sand in it.

Sand is grainy and is not very good at absorbing water, so the soil is light and drains well.

Clay has a much smaller particle size and is composed of the same substance as chalk. It absorbs water well and, therefore, means that the soil can be thicker and drain much less well.

This is a very basic explanation. As already mentioned; clay holds water (and so nutrients) much better than sand, though is prone to waterlogging, especially in winter, which is dangerous to plants.

Clay is much more susceptible to pans, though is generally considered to be a better soil type.

Pick out d differences and read up d type of plant that can be grown on the two soil.

weighing balance is a measuring instrument for determining the weight or mass of an object.

A spring scale measures weight by the distance a spring deflects under its load.

 A balance compares the torque on the arm due to the sample weight to the torque on the arm due to a standard reference weight using a horizontal lever.

Balances are different from scales, in that a balance measures mass (or more specifically gravitational mass), where as a scale measures weight (or more specifically, either the tension or compression force of constraint provided by the scale).

Weighing scales are used in many industrial and commercial applications, and products from feathers to loaded tractor- trailers are sold by weight.

BIOLOGY PRACTICAL SUMMARY
Specimen A- garden egg
features

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* epicarp is soft and flesh
* many seeds are present
* epicarp is edible
It is dispersed by animal
economic importance

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* used in control of blindness
* good for ulcer patients
* helps to control obesity
The type of placentation is by axile
The botanical name is solanum melonge
Specimen B- tridax fruit
The botanical name is procumbenis and the family is called calyx. It is a true fruit, it develops from a superior monocarpous ovary and have one one seed. www.earlyface.com.n g The mode of dispersion is by wind becos it is light and small.
Specimen C- grain weevil
pylum- anthropoda
class- insecta
habitat- it lives in grains.
Economic importance

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* They cause losses to farmers
* Reduces grains to powder
* They bore holes in grains and eat them up.
Prevention and control measures

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* early harvesting *proper storage of produce *hand picking *spray of insecticides eg DDT
External features of weevil

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it is divided into 3;the head,thorax,and abdomen.
Specimen D- tick
class- arachnida
phylum- anthropoda
habitat-found on goats,sheep,dogs.
External features

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the body is divided into 2;
the head
the abdomen.
Economic importance

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* they act as vectors of disease
* they cause great annoyance and irritation to host
* bites may become a source of secondary infection.
Control measures

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by picking
use of insecticides
burning the grasses where the animal graze.
Differences btw weevil and tick

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weevil                              tick
antenna present             antenna absent
rostrum present              rostrum absent
bristles absent                 bristle present
similarities btw both of them

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both have vectors
both have head,thorax and abdomen
both have jointed legs.
Specimen E- rat
phylum- chordata
class- mammalia
habitat- bush,dirty corner
External features

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the body is covered with hairs
it has an external ear
the body is divided into head,neck,trunk and tail
Adaptation

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the eyes are placed on either side of the head to allow wide range of vision.
the pear-shaped head,narrow body and short folded legs allow for easy movement.
Limbs end in claws for digging the burrow
the body is covered with hairs which aid temperature regulation
Specimen J- tilapia fish(bony fish)
phylum- chordata
sub phylum- vertebra
class- pisces
habitat- aquatic
Adaptations of fish to its environment
streamlined body: this allows for easy movement in water
gills: offers an efficient means of respiration in water
scales: they protects against injury,control movement of salt in and out of fish body.
Specimen k-toad
phylum- chordata
class- amphibia
habitat- live on both terristrial and aquatic habitat
External features

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The body is divided into head and trunk
Adaptation of the toad for life

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On land
presence of longer muscular hind limb for hopping
In water
web on the hind limb for swimming
oval streamlined shape for easy movement
absence of neck to reduce friction during swimming
Specimen L- agama lizard
phylum- chorama
class- reptinla
habitat- terrestrial
Adaptation of lizard to terrestial environment

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limbs are developed for movement on land
dry scaly skin to protect it from drying up
they have the ability to change color which helps them to escape from their enemies
egg have shells to protect the embryo from mechanical damage.
Compiled by MEGAX...... STAY TUNED.