Question 1

Through photosynthesis at least a half of the total carbon dioxide fixation on earth is carried out by?

Accepted Answer

Algae

Question 2

In a majority of flowering plants, out of the four megaspores, what is the ratio of functional and degenerate megaspores?

Accepted Answer

1:3

Question 3

The body of all complex animals consist of only _______ basic types of tissue(s).

Accepted Answer

4

Question 4

Which is the longest bone in human body?

Accepted Answer

Femur

Question 5

Carotene in fruits and vegetables gives it which color?

Accepted Answer

Orange

Question 6

Myopia is a defect of eyes which is also known as

Accepted Answer

Near Sightedness

Question 7

Reflex actions are controlled by

Accepted Answer

A reflex arc is a neural pathway that controls a reflex. In vertebrates, most sensory neurons do not pass directly into the brain, but synapse in the spinal cord. This allows for faster reflex actions to occur by activating spinal motor neurons without the delay of routing signals through the brain.

Question 8

Conversion of Glycogen to Glucose is stimulated by

Accepted Answer

Glucagon

Question 9

What color is Lobster blood?

Accepted Answer

Lobsters, like snails and spiders, have blue blood due to the presence of hemocyanin, which contains copper. In contrast, vertebrates and many other animals have red blood from iron-rich hemoglobin.

Question 10

Genes are made of

Accepted Answer

Genes: The DNA is the genetic material. The DNA is made of several nucleotides. A nucleotide means, one nitrogenous base one sugar molecule and a phosphate molecule. These Nucleotides occur in sequences and several nucleotides form one gene ( a functional gene is called a cistron)

Question 11

The Mode of nutrition in which particulate food is devoured is

Accepted Answer

The feeding mechanism is of several types. If it is entirely plant-like (photosynthesis),it is called holophytic. It is entirely (holo) animal-like (zoic), that is devouring already existing food, it is called holozoic.

Question 12

Infection of salivary glands by a virus leads to

Accepted Answer

Mumps: This is a swelling caused by inflammation of parotid glands placed in front of our ear region. The Inflammation is caused by a virus.

Question 13

The insects do not have blood pigments because

Accepted Answer

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.

Question 14

Activation of the receptors by stimuli is called

Accepted Answer

Sensation is the activation of the receptors by stimuli.

Question 15

Type 1 diabetes is more common than type 2 ?

Accepted Answer

Type 2 diabetes is the most common form of diabetes. If you have type 1 diabetes your body does not release insulin. If you have type 2 diabetes your body does not use insulin properly.

Question 16

What carries Blood back to the Heart?

Accepted Answer

Veins carries Blood back from the body parts to the Heart. We know that The circulatory system of our body is a loop. The Heart is the pump, the arteries and their smaller branches (arterioles) carry oxygen rich blood all through your body and the veins and their smaller branches (venules) carry oxygen depleted blood and waste products back.

Question 17

Which of the following does not occur during Mitosis?

Accepted Answer

Replication of the DNA does not occur during Mitosis.

Question 18

Unlike Mitosis, Meiosis results in the formation of

Accepted Answer

Unlike Mitosis, Meiosis results in the formation of 4 Genetically different cells. Meiosis results in the formation of 4 Haploid daughter cells from one Diploid parent cell.

Question 19

How many Nephrons are in each kidney?

Accepted Answer

There are about 1,000,000 nephrons in each human kidney. Nephron, functional unit of the kidney, the structure that actually produces urine in the process of removing waste and excess substances from the blood.

Question 20

Which event occurs during interphase?

Accepted Answer

The cell carries out the metabolic processes and it grows during interphase. The cell cycle has three phases that must occur before mitosis, or cell division happens. These three phases are collectively known as interphase. They are G1, S, and G2.

Biology Questions