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Answers by Naina B.

Alex,   Animal cells destroy toxic particles by combination of endocytosis, lysosome digestion and exocytosis.   Firstly, cell encircles the toxin in a small vesicle by endocytosis. If cell senses that toxin in vicinity then cell membrane creates projections around it to...

It is the preserved specimen (plant, animal or sometimes simply the shell/skeleton/stem and branches that are buried in earth in between stones or heavy layers of sediment.   Best, 

Hi Jaime,   Assuming that your question pertain to human sex determination, here is the answer:   In humans and most mammals, females have XX ( two X chromosomes) and they are homozygous for X chromosome.   In humans and most mammals, males have XY, ( one X...

Three parent baby is a baby where two biological parents contribute genome through their sperm and egg for the zygote to morula to blastocyst to embryo to fetus to baby.   Blastocyst is implanted in the uterus of a mother different than biological mother, this foster mother becomes...

What organ...? (answer)

Blood vessels!     Blood transports nutrients, oxygen and wastes including carbon-dioxide  through network of arteries and veins!

see below..... (answer)

Gene mutation could be a  single amino acid change in coding sequence of the gene, it could be small deletion of 1 or several amino acids. Such gene mutation would only be detectable if it creates a significant alteration of phenotype.   Some gene mutations that do not alter protein...

Carli,   Semi permeable implies to property of plasma-membrane where it permits transport of certain molecules but not all. Permissible molecules are selected for the best survival of the cell and therefore, plasma membrane is selectively permeable!   Phospholipid bilayer...

Each strain grows on specific medium and might have specific antibiotic resistance gene. You can find that out from literature and get agar plates with those specific antibiotics each. Only the strain with antibiotic resistance gene would grow, other would not. Pick up single colonies from plate,...

Myelination is development of myelin sheath around the axons of neurons, it is formed by special type of glial cells known Oligodendroctyes or Schwann cells. They protect axons and obviously decrease the loss of electirc current of nerve impulse/action potential.    Best,