tips of leaves on my flowering plants are black, too much water?

tips of leaves on my flowering plants are black, too much water?
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A condition in which either pollen is absent or non functional in flowering plants.

Description : A condition in which either pollen is absent or non functional in flowering plants.

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Movements due to light are shown by (a) Flowering plants (b) Lower plants (c) All land plants (d) All the plants

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Which of the following is true for photoperiodic? (1) It occurs only in plants (2) It is related to flowering in plants (3) It is related to feathers of animals (4) It is the reaction of organisms to the length of day or night

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Out of 900 reported species of living gym- nosperms; conifers are represented by about 500 species; About 2;50;000 species of an- giosperms (flowering plants) have also been reported in the world. The vast and dominant woodlands in Europe; Asia; North America and mountains such as Himalayas are wooded with?

Description : Out of 900 reported species of living gym- nosperms; conifers are represented by about 500 species; About 2;50;000 species of an- giosperms (flowering plants) have also been reported in the ... and dominant woodlands in Europe; Asia; North America and mountains such as Himalayas are wooded with?

Last Answer : only conifers

What are the two classes of flowering plants?

Description : What are the two classes of flowering  plants?

Last Answer : They are Monocotyledons or Monocots and Di- cotyledons or Dicots CELL

Which is the most advanced flowering plants?

Description : Which is the most advanced flowering  plants?

Last Answer : Angiosperms

The flowering plants are called?

Description : The flowering plants are called?

Last Answer : Angiosperms

How seed and fruit are formed in flowering plants? What are the parts of seed?

Description : How seed and fruit are formed in flowering plants? What are the parts of seed? 

Last Answer : Seed Formation: - Ripened ovule after fertilization is called seed. The seeds are the embryos of flowering plants in dormant stage. Seeds provide protection and nourishment to the embryo. A seed has three ... fleshy or scaly and forms fruit. Fruit protect seed and help in dispersal of the plant.  

Write a note on double fertilization in flowering plants?

Description : Write a note on double fertilization in flowering plants?

Last Answer : In this method pollen tube nucleus helps to carry the two sperm nuclei into the ovule. One of the two sperms fuses with egg to form diploid zygote and other sperm nucleus fuses with the ... gamete at a time fuse with two female cells, therefore this fertilization is called double fertilization. 

Write a note on life cycle of flowering plants?

Description : Write a note on life cycle of flowering plants? 

Last Answer : There are two types of generations in flowering plants: -  Sporophytic Generation: - It is dominant, multicellular diploid generation which is formed from zygote or fertilized egg. Sporophyte ... gametes called sperms. The female gametophyte develops from megaspore which produces eggs by meiosis.  

What are artificial methods of vegetative propagation in flowering plants?

Description : What are artificial methods of vegetative propagation in flowering plants? 

Last Answer : Some plants can be artificially propagated by using their vegetative parts and this is called artificial vegetative propagation. Following are the types of artificial vegetative propagation: - 1) CUTTING: - ... vegetative propagation. ii) For example onion bulb, Canna or lily and potato tuber. 

What are natural methods of vegetative propagation in flowering plants?

Description : What are natural methods of vegetative propagation in flowering plants? 

Last Answer : 1) BY STEM: - The methods of vegetative propagation by stem are runners and suckers. Runners: i) A runner is long and thin stem, which creep along the surface of soil. ii) It gives ... ground, the adventitious buds appear in the notches with adventitious roots. iv) These grow into new plants. 

What is common between vegetative reproduction and apomixis? (a) Both are applicable to only dicot plants. (b) Both bypass the flowering phase. (c) Both occur round the year. (d) Both produce progeny identical to the parent.

Description : What is common between vegetative reproduction and apomixis? (a) Both are applicable to only dicot plants. (b) Both bypass the flowering phase. (c) Both occur round the year. (d) Both produce progeny identical to the parent.

Last Answer : (d) Both produce progeny identical to the parent

Seed formation without fertilisation in flowering plants involves the process of (a) somatic hybridisation (b) apomixis (c) sporulation (d) budding

Description : Seed formation without fertilisation in flowering plants involves the process of (a) somatic hybridisation (b) apomixis (c) sporulation (d) budding

Last Answer : (b) apomixis

Which one of the following statements regarding post-fertilisation development in flowering plants is incorrect? (a) Ovules develop into embryo sac. (b) Ovary develops into fruit. (c) Zygote develops into embryo. (d) Central cell develops into endosperm

Description : Which one of the following statements regarding post-fertilisation development in flowering plants is incorrect? (a) Ovules develop into embryo sac. (b) Ovary develops into fruit. (c) Zygote develops into embryo. (d) Central cell develops into endosperm

Last Answer : (a) Ovules develop into embryo sac.

In short day plants, flowering is induced by (a) photoperiod less than 12 hours (b) photoperiod below a critical length and uninterrupted long night (c) long night (d) short photoperiod and interrupted long night

Description : In short day plants, flowering is induced by (a) photoperiod less than 12 hours (b) photoperiod below a critical length and uninterrupted long night (c) long night (d) short photoperiod and interrupted long night

Last Answer : (b) photoperiod below a critical length and uninterrupted long night

Importance of day length in flowering of plants was first shown in (a) cotton (b) Petunia (c) Lemna (d) tobacco.

Description : Importance of day length in flowering of plants was first shown in (a) cotton (b) Petunia (c) Lemna (d) tobacco.

Last Answer : (d) tobacco.