Plant Tissues : Meristematic | Tissues | Assessment | English | Grade 9

In the body a specific function is performed by a specific group of cells at a definite place. This group of cells is called a ______.

• Organism

• Tissue

• Organ

• Bacteria

Answer explanation

In the body a specific function is performed by a specific group of cells at a definite place. This group of cells is called a tissue.

Tags

NGSS.MS-LS1-3

The tissue of plants whose cells are actively dividing throughout their life are called ______.

• Simple tissue

• Dividing tissue

• Meristematic tissue

• Both option 2 and option 3

Answer explanation

The tissue of plants whose cells are actively dividing throughout their life are called dividing tissue. This tissue is also called meristematic tissue. Hence option 4 is the right answer.

Which of the following statement is not true with respect to plant and animal tissues?

• Most of the tissues of animals are made up of dead cells

• Plants consume more energy as compared to animals

• Both option 1 and option 2

• None of these

Answer explanation

Due to different body structure plants and animals have different types of tissues. We know that plants stand upright in one place. Therefore they need support. That's why in plants supportive tissues are present in large amounts. Supportive tissues are made up of dead cells. Therefore most of the tissues of animals are made up of dead cells. Animals can move from one place to other. That's why animal require more energy than plants. That's why in animals most of the tissues are made up of living cells. Hence statement of option 1 and 2 are not true. Hence option 3 is correct answer.

Which of the following cell organelle is not present in the cells of meristematic tissue?

• Vacuole

• Mitochondria

• Nucleus

• Golgi complex

Answer explanation

The cells of meristematic tissues divides life time. That's why cells of meristematic tissues do not need to store nutrients. The function of the vacuole is to store nutrients. Since cells of meristematic tissue do not store nutrients, that's why they do not have vacuole. Hence option 1 is the right answer.

Tags

NGSS.MS-LS1-2

In the Science experiment Natasha has to observe the cells that divide for life time. Which plant part should Natasha cut to observe the cells that divide for life time?

• Growing flower

• Root tip

• Fruit

• None of these

Answer explanation

We know that the cells of meristematic tissue divides life time. So to observe the cells that divides for life time, Natasha should cut the plant part where the meristematic tissue is localised. Meristematic tissue is of 3 types: apical meristem, lateral meristem and intercalary meristem. Apical meristem is present in the root tip and shoot tip. Lateral meristem is present in the lateral sides roots and stem. And intercalary meristem is present in the leaf base and near the internodes of the stem. Therefore from given options the meristematic tissue is present in the roots. So to observe the cells that divides for life time, Natasha should cut the root tip of the plant.

In a Science experiment, two money plants were grown in different glass jars filled with water. After 5 days the tip of money plant in jar 1 was cut by 1 cm. While the tip of money plant in jar 2 was not removed. After 7 days it was observed that the length of money plant in jar 1 has not increased in length. This is because:

• Apical meristem was removed

• Intercalary meristem was removed

• Lateral meristem was removed

• All of these

Answer explanation

In the tip of the roots and stems, apical meristem is present. Apical meristem increases the length of roots and stems. Since in experiment the tip of roots was removed. That means apical meristem is removed. Due to which the roots stop growing. Hence option 1 is the right answer.

Tags

NGSS.MS-LS1-5

The height of the maize plant is increased but the girth is not increased over a period of time. This is due to absence of:

• Apical meristem

• Lateral meristem

• Intercalary meristem

• Vertical meristem

Answer explanation

We know that lateral meristem increases the circumference of plant. While apical meristem and intercalary meristem increases the length of plant. Here the girth that means circumference of the maize plant is not increased over a period of time. While its height increases. Therefore we can say that in maize plant apical meristem is absent. Hence option 2 is the right answer.