Bio f4 chap 2 Flashcards
What will happen to the contractile vacuole if paramecium is placed in concentrated salt solution?
The contracting rate of the contractile vacuole will decrease.
What will happen if the organisation level of cells does not exist in n organism?
Unable to carry out a lot of functions that are needed for survival
Why chloroplast only found in plant cells and not in animal cells?
- chloroplast is used to produce food during photosynthesis
- animal cells do not produce food
An aphid is a small insect which sucks sap in plants. An aphid puts its mouth in the stem of a plant and sucks its nutrients. Name the liquid obtained from the plant and explain why aphids are mostly found in the daytime.
- phloem sap
- photosynthesis takes place during day
- more sugar is produced
X is a digestive organ consisting of cells with a high concentration of rough endoplasmic reticulum for protein digestion. What is X? Explain.
- stomach
- RE carries proteins produced by ribosomes
- stomach synthesises enzymes in large amounts for protein breakdown
Weed killers can stop the transportation of certain minerals in plants through the hair root tissue. Explain.
- herbicides contains respiratory poisons
- destroy respiratory enzymes that will stop cellular respiration
- no ATP produced
- hinders the active transportation of ions into plant cells
What will happen if a cell does not have a Golgi apparatus?
- X process, modify of protein
- X separate according to their respective destinations
- X packaged into vesicles
Why epithelial tissue can cause cancer?
- high rate of cell division
- mutation spontaneously due to an error during DNA replication
- outermost layer
- first tissue to be exposed to substances that can cause cancer
What is the latest technology that can used to develop new cartilage tissues?
- embryonic stem cell injections to parts of the damaged cartilage discs
