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- Question
Pollination is best defined as
Options- A. growth of pollen tube in ovule
- B. visiting flowers by insects
- C. germination of pollen grains
- D. transfer of pollen from anther to stigma
- Correct Answer
- transfer of pollen from anther to stigma
ExplanationPollination is when pollen grains from an anther, the male portion of a flower, are transferred to a female part of the flower, known as the stigma. In order for pollination to be successful, the pollen grains transferred must be from a flower of the same species.
After the pollen grains land on the stigma, they create a pollen tube through the length of the style or stalk connecting the stigma and ovary. Once the pollen tube is complete, the pollen grain will send sperm cells from the grain down to the ovary. When the sperm cells reach the ovary and the egg cells, fertilization will occur, which will result in the formation of the seed. The seed will then be released from the parent plant and will be able to grow into a plant and continue the reproductive cycle using the method of pollination.
- 1. A true species in mauritius failed to reproduce because of the extinction of a fruit eating bird. Which one of the following was that bird?
Options- A. Dove
- B. Dodo
- C. Condor
- D. Skua Discuss
- 2. Smallest bone of human body is _________
Options- A. Nails
- B. Fibula
- C. Bone of nose
- D. Stapes Discuss
- 3. In photosynthesis________
Options- A. Light energy is converted into chemical energy
- B. Chemical energy is converted into Light energy
- C. Chemical energy is converted into electrical energy
- D. Light energy is converted into Mechanical energy Discuss
- 4. The insects do not have blood pigments because
Options- A. there is no blood
- B. blood does not have a respirratory function
- C. tissues have pigments
- D. pigments are elsewhere Discuss
- 5. The book Historia plantrum is written by
Options- A. Aristotle
- B. Theophrastus
- C. Hipporates
- D. Darwin Discuss
- 6. Which of these is Not a Carcinogen?
Options- A. Cadmium
- B. Asbestos
- C. Benzene
- D. All the above Discuss
- Lungs
- Gastrointestinal tract types of Cancer.
- Leukemia
- Hodgkin's lymphoma types of Cancer.
- Prostate type of Cancer.
- 7. Which of the following is not a function of proteins?
Options- A. Build tissues such as bone and muscle
- B. Help to fight disease
- C. Nail formation
- D. Store and transmit Heredity Discuss
- Nucleic acids store and transmit heredity.
- 8. Translation of the dna sequence AAGCTGGGA would result in
Options- A. a DNA strand with the base sequence TTCGACCCT
- B. an mRNA strand with the sequence TTCGACCCT
- C. a sequence of three amino acids linked by peptide bonds
- D. an mRNA strand with the sequence UUGCACCCU Discuss
- 9. Which letter indicates systolic pressure?
Options- A. i
- B. b
- C. c
- D. a Discuss
- 10. Angioplasty is the most typical treatment for arteriosclerosis.
Options- A. TRUE
- B. FALSE Discuss
Biology problems
Search Results
Correct Answer: Dodo
Correct Answer: Stapes
Correct Answer: Light energy is converted into chemical energy
Correct Answer: blood does not have a respirratory function
Explanation:
The blood of some invertebrate animals like the earthworm is red due to haemoglobin pigment, but the pigment is dissolved in the plasma. In vertebrates the same pigment is found in the red corpuscles and not in the plasma.
Correct Answer: Theophrastus
Correct Answer: All the above
Explanation:
Asbestos can cause
Benzene can cause
Cadmium can cause
Correct Answer: Store and transmit Heredity
Explanation:
Protiens can help fight specific diseases, always there to regulate cell processes and build muscle/tissues.
Structural proteins also known as Fibrous proteins, are necessary components of your body. They include collagen, keratin and elastin. Collagen forms the connective framework of your muscles, bones, tendons, skin and cartilage. Keratin is the main structural component in hair, nails, teeth and skin.
Correct Answer: a DNA strand with the base sequence TTCGACCCT
Correct Answer: a
Explanation:
a - at the peak of changes in blood pressure indicates the systiolic pressure.
Correct Answer: FALSE
Explanation:
Angioplasty, also known as balloon angioplasty or PTA, is a minimally invasive, endovascular procedure to widen narrowed or obstructed arteries or veins, typically to treat arterial atherosclerosis.
Hence, the given statement that Angioplasty is the most typical treatment for arteriosclerosis is FALSE.
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