In this worksheet, we will practice describing cell growth and differentiation in organisms, recalling examples of differentiated cells and interpreting percentile charts.
A palisade cell is a specialized cell found in plant leaves. Why is it an advantage for a palisade cell to contain a large amount of chlorophyll?
- AChlorophyll is the site of respiration; so, if there is more chlorophyll, more respiration can occur.
- BChlorophyll is the site of photosynthesis; so, if there is more chlorophyll, more photosynthesis can occur.
- CChlorophyll helps the plant grow.
- DChlorophyll is a source of stem cells that can divide to replace damaged cells in the plant.
- EChlorophyll is the site of digestion; so, if there is more chlorophyll, more digestion can occur.
What is the term given to cells that are specialized to perform a particular function?
Which of the following formulae is correct for calculating percentage changes in mass?
An ash tree starts with a mass of 2.5 kg. After 4 years, it has a mass of 75 kg. Calculate the percentage change in mass of the ash tree.
- D 2,900%
Which of the following is not an example of a specialized cell?
- AA fat cell
- BA nerve cell
- CA ciliated epithelial cell
- DA red blood cell
- EA stem cell
Which of the following is the correct definition of growth?
- AGrowth is a process that continues until all cells in an organism are specialized.
- BGrowth occurs when cells divide uncontrollably.
- CGrowth is all the changes that take place in the body over time.
- DGrowth is the increase in the size of an organism due to an increase in the number or size of cells.
- EGrowth is an increase in size due to an excess of nutrients.
What are the three zones of growth in plants?
- AZone of lengthening, zone of distortion, zone of multiplication
- BZone of elongation, zone of differentiation, zone of division
- CZone of lengthening, zone of differentiation, zone of division
- DZone of elongation, zone of distortion, zone of division
- EZone of elongation, zone of differentiation, zone of multiplication
What is the role of the meristem in plants?
- AThe meristem is a group of cells in the plant that elongate to help the plant grow.
- BThe meristem is used in the reproduction and formation of new plants.
- CThe meristem provides energy to the plant for growth.
- DThe meristem is a group of cells in the plant that differentiate into specialized cells.
- EThe meristem is a group of cells in the plant that continually divide by mitosis to provide new cells.
The percentile chart provided shows the mass (in kilograms) of a group of babies as they grow from 0 to 12 months.
The red line shows the trend for the 99th percentile.
The blue line shows the trend for the 75th percentile.
The purple line shows the trend for the 50th percentile.
The green line shows the trend for the 25th percentile.
Baby A is in the 75th percentile. What does this mean?
- ABaby A is the 75th largest baby.
- B75% of babies the same age will have the same mass as baby A.
- C75% of babies the same age will have a smaller mass than baby A.
- D25% of babies the same age will have a smaller mass than baby A.
- E75% of babies the same age will have a larger mass than baby A.
What will the mass of a baby in the 99th percentile be when it is 8 months old?
- A 10.5 kg
- B 8 kg
- C 12 kg
- D 12.5 kg
- E 11 kg
What will the mass of a baby in the 50th percentile be when it is 6 months old?
- A 8.5 kg
- B 6.6 kg
- C 11 kg
- D 10 kg
- E 9 kg
If a baby is in the 25th percentile, what percentage of babies that age will have a larger mass?
What percentile would a baby who is consistently the average mass of this population be in?
By how many kilograms should the weight of a baby in the 75th percentile increase between 0 and 2 months?
- A 2 kg
- B 2.5 kg
- C 1.5 kg
- D 3.5 kg
- E 3 kg