BIOLOGY 1 Marks Question

Define the following terms: Perigynous flower.

Define the following terms: Epipetalous stamen.

Name the inflorescence shown in (A) and (B).

Secondary growth does not take place in monocot plants. Give possible reason.

What are the two layers of seed coat?

Name two plants whose sub-aerial stems spread to new niches and produce new shoots.

What is pulvinus? Give an example of a plant that has pulvinus.

Name two types of roots that give additional support to the plant.

Name the type of placentation shown in the given figures and give one example of each.

Name two functions of collenchyma.

Name the following:

1. The thimble-like structure covering the root apex.
2. The region in the root tip that is responsible for growth of root in length.

Why is a flower of Cassia described as Zygomorphic?

Write one diagnostic feature of Fabaceae.

What are adventitious roots?

In Alstonia, the phyllotaxy is called whorled. Why?

Write the floral formula of family-Fabaceae and give its two examples.

Write the scientific name of a member of Liliaceae, whose roots are used as blood purifiers.

Describe the nature of the stem of Pistia.

In aquatic plants like Pistia and Eichhornia, leaves and roots are found near _____________.

Name one plant product through which we use phloem fibres commercially.

Where are root hairs present in root?

What are the layers, constituting the bark?

Name one ornamental plant each, of families.

1. Solanceae and.
2. Liliaceaed.

Tendrils of pea, spines of cactithorn of citrus, pitcher in pitcher.

Write the common source of oil yielding plants from the family-Fabaceae.

Describe the structure of a fruit with the help of a diagram.

Identify the following diagram and write important features.

In swampy areas like the Sunderbans in West Bengal, plants bear special kind of roots called _____________.

What is micropyle in a seed?

Provide the technical term for the following:

1. The stalk of the leaf.
2. The pattern of arrangement of leaves on the stem.

Why some tap roots become swollen and fleshy?

Why are flowers of mustard referred to as hypogynous?

1. Assign the following plants to their respective plant families and describe the nature of gynoecium in each of them.

1. Allium cepa (Onion).
2. Pisum sativum (Pea).

2. What are coleoptile and coleorhiza?

1. Give two general characteristics of sepals.
2. What is the main function of sepals?

What are polyandrous stamens?

Why insects attract towards pitcher plants?

What makes an axillary bud?

What are the components of stomata?

What is pulvinus? Give an example of a plant that has pulvinus.

Name the kind of phyllotaxy in.

1. Mustard.
2. Calotropis.

Justify that ginger/ Colocasia/ potato is a stem, though it is non-green and underground.

What is meant by polypetalous corolla?

Add the missing floral organs of the given floral formula of Fabaceae.

Explain epidermal tissue system of plant.

Write the floral fromula of onion plant. Draw its floral diagram. Give the nature of gynoecium of its flower.

Mention the functions of underground stems.

Where is mother axis drawn in a floral diagram?

Name one ornamental plant each of family.Solanceae and Fabaceae.

Name the ornamental plants of lily family.

What type of leaf modification is seen in Australian Acacia?

'X' is the female reproductive part of the flower, which consists of three parts A, B, and C. 'A' is the swollen bottom part and C is the sticky part. Name all X, A, B, and C.

Name the type of placentation shown in the given figures (i) and (ii). Give one example of each type.

Select odd one: Filament, style, stigma, ovary.

In a longitudinal section of root tip, starting from tip upwards, are the regions of:

1. Meristem, root cap, cell enlargement, cell maturation.
2. Cell maturation, cell enlargement, meristem, root cap.
3. Cell enlargement, cell maturation, root cap, meristem.
4. Root cap, meristem, cell enlargement, cell maturation.

Mention the two major functions of stem.

Why the leaves of Aloe and Agave store water?

Vinay was going through an industrial area with his grandfather. While on the way, he felt suffocated and dizzy due to the smoke coming out of the factory. Vinay got angry and started shouting that all these factories should be closed. His grandfather calms him down and explained that it is due to large scale cutting of trees for urbanization and industrialization which has disturbed the balance of atmospheric gases. He also explained various economic importance of plants.

1. Large scale cutting of trees leads to ___________________?
2. What initiatives should be taken to maintain the atmospheric balance.
3. Give various economic importance of plants.
4. What values are shown by his grandfather?

How is valvate aestivation different from twisted aestivation?

What type of placentation is seen in the ovary of.

1. Argemone and.
2. Citrus.

Assign the following to their respect plant families and describe the nature of gynoecium in each of them:

1. Trifolium.
2. Petunia.

Define inflorescence.

Which same plant part has transformed into the following different modifications?

1. Tendril of pumpkin/ watermelon.
2. Thorn of Citrus/ Bougainvillea.

Which kind of inflorescence is shown in following diagram? Describe its feature.

Write components of a stele.

Why is a leaf of neem called pinnately compound?

Name two plants whose flowers have stamens of varying lengths.

Mention (a) the symmetry of flower and (b) the characteristic type of fruit, found in Fabaceae.

Mention the two functions of petiole in a leaf.

Which roots are involved in nitrogen-fixation? Name them.

Draw the labelled diagram of the following:

1. Gram seed.
2. VS of maize seed.

Name the phyllotaxy shown in figure (A) and (B).

What is meant by sheathing leaf base? Which type of plants have it?

How superior and inferior ovaries are indicated by symbol?

Why is phyllotaxy in Alstonia described as whorled?

Write one function of root.

What is the role of cork cambium?

How many ovule(s) is/ are seen in the ovary of sunflower?

What is root cap? What is its function?

Name two plants whose gynoecium is apocarpous.

Provide the technical term to radially symmetrial flowers.

1. What is a parthenocarpic fruit?
2. What are pneumatophores?

What type of leaf modification is seen in Australian Acacia?

Write a short note on two main types of roots.

Define morphology.

Name the family in which carpels of the flower are obliquely placed.

A maize grain is not a seed. Explain.

The scutellum observed in a grain of wheat or maize is comparable to which part of the seed in other monocots.

What constitute primary meristem? Why?

Mention two general functions that roots perform.

Which is the technical term used for the androecium in a flower of China rose?

Draw the floral diagram and write the floral formula of Brassicaceae.

Name the type of roots, which perform the function of respiration in Rhizophora.

What are stilt roots? Give two examples.

Describe the fruit of Allium cepa (onion).

Select odd one: Cotyledons, endosperm, plumule, radicle.

What does hilum of a seed represent?

How is a staminode different from a stamen?

Why are velamen tissues present in epiphytic roots?

In a typical leaf what kind of cells are usually present in mesophyll?

Name a plant whose flowers are asymmetric.

What is pericarp? Name its three different regions in a fleshy fruit.

Can xylem be called a permanent tissue? Why or why not?

Name the part shown at (A) and (B) in the diagram.

How will you show the monocarpellary and unilocular condition of gynoecium of Lathyrus odoratus (sweet pea)?

Name two plants with stem thorn. What is the advantage of thorn to the plants?

Name two plants whose ovary shows free-central placentation.

Why are flowers of cucurbits referred to as epigynous?

Why is the corolla of Solanum described as gamopetalous?

Give example of:

1. Rhizome.
2. Tuber.

List out the three characteristics of modified stem bulb with examples.

Name two plants of Fabaceae that yield each of the following:

1. Edible oil and.
2. Foddera.

What is the function of companion cells in phloem?

Differentiate family-Solanaceae and Liliaceae SD on the basis of gynoecium.

Name one plant of Liliaceae as a source for each of the following:

1. Medicine.
2. Vegetables.
3. Colchicine.

What are the functions performed by the veins in a leaf?

Name the parts labelled as 'a' and 'b'shown in the given figure.

Select odd one: Sepals, petals, tepals, carpels.

Stomata are present on the ventral side of a dicot leaf. What may be the reason?

1. What are bracteate flowers?
2. What are parthenocarpic fruits?
3. Give two examples of non-endospermic seeds? Why are they called so?

What is phyllotaxy? Name the type or phyllotaxy found (i) Mustard, (ii) Alstonia and (iii) Calotropis.

Write three similarities between the ovaries of Solanaceae and Liliaceae.

How the runners of grasses can serve as means of vegetative propagation?

What is aleurone layer in a maize grain?

How does the mesocarp of mango differ from that of coconut, though they both are drupes?

What is root cap? Which any two variations are found in this?

Name the part labelled as A and B, shown in given figure.

Select odd one: Turnip, Sweet potato, carrot, radish.

Why development of root branches is Endogenous?

You are given two slides having T.S. of roots and stems. How will you identify which slide is of root and which is of stem?