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q why does heat makes matter to expandanswer-water contracts as it cools similar to all other liquids until it reaches a temperature of about 4
what are plant hormonesplant hormones also known as phytohormones are substances that control the embryonic development and the growth of the adult
q describe the isotopesanswer-an atom of an element that has a diverse number of neutrons in its nucleus to other atoms of the
what is tree girdling what happens to a plant when that girdle is removed from the stem below the branches malpighis girdling or tree girdling is the
what are the forces that make water to flow within the xylem from the roots to the leaveswater enters the roots because of the root pressure and a
what is capillarity how this phenomenon is chemically explained what is the relevance of capillarity for water transport in plants capillarity is the
q explain the magnetize of metalanswer-you can rub a magnet alongside the metal in one direction for a bunch of times the more the better and that
what is root pressure root pressure is the pressure that forces water from the soil to be absorbed by the xylem of the root it is because of the
q illustrate the newton s laws of motionanswer-1 a body at rest will stay at rest and one in motion will remain in motion until and unless acted upon
q will a dc motor really produce voltage if it is spun in reverseanswer-it will produce voltage if you spin it forwards too the merely difference
q why do you not collapse in the pressure created by the atmosphereanswer-if the outward pressure inside your body werent equal to the pressure
are the xylem and the phloem made of living cells the cells that constitute the xylem ducts are dead cells killed by lignin depositionthe cells of
is transportation of gases in tracheophytes made through the vascular tissuescarbon dioxide and oxygen are not transported by the xylem or phloem
how do plants solve the problem of transporting substances throughout their tissuesin bryophytes the substance transport is completed by diffusion in
when air humidity is high does the plant transpiration increase or lowerwhen air humidity is high transpiration diminishes as transpiration is a
is transpiration the only way through which leaves lose water plants do not only lose water as vapor as by transpiration the leaves also lose liquid
how has the position of the stomata changed in some plants to prevent excessive water loss by transpirationin some plants that have leaves that be
q what is the dissimilarity between free electron theory and band theory of solidsanswer-the free electron theorythis theory notifies that metals
q show the categorization of alloysalloys are able to be classified by the number of their constituents an alloy with two components is described as
q explain an alloyanswer-an alloy is a homogeneous hybrid of two or else more elements at least one of which is a metal and where the resulting
q explain densityanswer-density is a physical characteristic also is a measure of mass per unit of volume of a material or substance it is a
q explain the law of machinesanswer-machines which are utilized to lift a load are governed by the law of machines which states that the effort to be
q what would occur if a disk one light second in circumference were to spin at 60 rpmanswer-60 revolutions for each minute is one revolution per
what are stomata how do these structures participate in the plant transpirationstomata singular stoma are small specialized passages for water and
what is plant transpiration what are the two main types of plant transpiration process which of them is more significant in volumetranspiration is