1) Give 5 examples of animals in which external fertilization occurs.
2) Distinguish between an egg and a zygote.(3 points each)
3) How foetus is different from embryo? (2 points each)
4) Which part of coconut is edible- Fruit, seed, paricarp or endosperm? What is paricarp?
2) Distinguish between an egg and a zygote.(3 points each)
3) How foetus is different from embryo? (2 points each)
4) Which part of coconut is edible- Fruit, seed, paricarp or endosperm? What is paricarp?
1.External fertilization generally only occurs in aquatic creatures as water acts as a vehicle through which sperm can travel.Examples of external fetilization are
a.Frog
b.Frisky Fish
c.Suave Starfish
d.Sensual sea urchins
e.Coy coral
f.Salmon, cod, trout, and char are all examples of the fishes that externally fertilize.
2
a.Egg cells are roductive cells that unite at fertilization whereas zygote is a fertilized egg.
b.Egg cells are haploid cells, while the zygote cells are diploid cell.
c.Egg cells has just one complete set of chromosomes, the zygote contains two complete sets of chromosomes.
d.Zygote cells are reproduce by mitosis, while egg celss do so by meiosis. 3.
The difference between an embryo and a fetus has to do with the different phases of baby’s development.
a.The embryo is defined as the developing pregnancy from the time of fertilization until the end of the eighth week of gestation,whereas from 8 weeks onwards until the day of birth it is a foetus, not an embryo.
b.During the embryonic period, cells begin to take on different functions. The brain, heart, lungs, internal organs and arms and legs begin to form. Once baby is a fetus, growth and development are aimed at prepping baby for life on the outside.
4.In coconut we have the fleshy and edible white layer, which is actually part of the endosperm - the meat of the seed.So endosperm is part of coconut which is edible.
Paricarp is the part of a fruit formed from the wall of the ripened ovary.
a.Frog
b.Frisky Fish
c.Suave Starfish
d.Sensual sea urchins
e.Coy coral
f.Salmon, cod, trout, and char are all examples of the fishes that externally fertilize.
2
a.Egg cells are roductive cells that unite at fertilization whereas zygote is a fertilized egg.
b.Egg cells are haploid cells, while the zygote cells are diploid cell.
c.Egg cells has just one complete set of chromosomes, the zygote contains two complete sets of chromosomes.
d.Zygote cells are reproduce by mitosis, while egg celss do so by meiosis.
3.
The difference between an embryo and a fetus has to do with the different phases of baby’s development.
a.The embryo is defined as the developing pregnancy from the time of fertilization until the end of the eighth week of gestation,whereas from 8 weeks onwards until the day of birth it is a foetus, not an embryo.
b.During the embryonic period, cells begin to take on different functions. The brain, heart, lungs, internal organs and arms and legs begin to form. Once baby is a fetus, growth and development are aimed at prepping baby for life on the outside.
4.In coconut we have the fleshy and edible white layer, which is actually part of the endosperm - the meat of the seed.So endosperm is part of coconut which is edible.
Paricarp is the part of a fruit formed from the wall of the ripened ovary.
