Monthly Mock Test (May 31) - NEET MCQ

Relative velocity of parrot w.r.t the train = 10 – (–5) = 15 ms^–1.
Time taken by parrot to cross the train  

Total distance = s;

Total time taken  = 

∴ Average speed = 

Let the body fall through the height of tower in t seconds. From,

we have, total distance travelled in last 2 seconds of fall is

D = D_t+D_{(t -1)}

or,  40 = 20 (t – 1) or t = 2 + 1 = 3s

Distance travelled in t seconds is

u = 0 m/s
S = u + (1/2)a(2n - 1)
S₄ = 0 + 1/2(2×4 - 1)
= 7a/2
S₃ = 0 + (1/2) a (2×3 - 1)
= 5a/2
Ratio, S₄/S₃ = 7a/2 ÷ 5a/2
=7/5

Velocity,  

Acceleration, 

we have, 0 = 6 t – 12 or t = 2s.

Hence, at t = 2 s the velocity will be  

h_max = 20 m and t = 5 sec. Time taken by the body to reach the ground from some height is the same as taken to reach that height.
Therefore, time to reach the ground from its maximum height is 5 sec.

No. of radial nodes in 3p-orbital = (n – ℓ – 1) [for p ortbital ℓ = 1] = 3 – 1 – 1 = 1

N(7) = 1s² 2s² 2p²

Unpaired electrons = 1.

n = 2, l = 1 means 2 p – orbital. Electrons that can be accommodated = 6 as p sub-shell has 3 orbital and each orbital contains 2 electrons.

This is as per the definiti on of Paul i’s Exclusion princieple.

The sub-shell with lowest value of (n + ℓ) is filled up first. When two or more sub-shells have same (n + ℓ) value the subshell with lowest value of 'n' is filled up first therefore the correct order is

Lone pair of electron means 2 electron(since it is pair)
For 4 lone pair electrons, we need 8 electrons in the outer shell. This is possible only with Cl- as it neutral Cl has 7 electrons and with addition of an electron they are 8 in number or 4 lone pairs of electrons.

Long filamentous threads of maize are the styles of the ovaries. In fact these are the longest styles in plants.

Single cotyledon of embryo in cereal grain is represented by scutellum. Coleoptile represent the covering of stem. Coleorhiza represents the covering of root.

The aleurone layer in maize grain is specially rich in proteins.
Aleurone (from Greek aleuron, flour) is a protein found in the endosperm of many seeds. It forms the outermost layer of the seed coat in some grains. During seed germination, hydrolysis in the seed causes the aleurone cells to break down into amino acids. Once triggered by hormones released from the embryo the aleurone synthesises enzymes in order to break down the starchy endosperm supplying sugars to drive the growth of roots and the acrospire. 

Aleurones can have two different morphological features, Homogenous and Heterogenous. The homogenous aleurone is consisted of similar protein bodies (e.g. Phaseolus vulgaris) while the heterogenous aleurone consisted different shape and type of proteins covered with a membrane (e.g. Ricinus communis).

Every part of tomato is edible except it's upper tip. In maize it's edible part is seeds. In guava edible part is thalamus, pericarp nd placenta. Datepalm is a simple and true berry fruit in which pericarp is fleshy and epicarp and mesocarp are edible.Hence, correct option is D.

In plant conducting tissue xylem has an important integral cell as xylem vessel which is without nucleus. The phloem on other hand has a row of sieve tubes which are also without nucleus at maturity.

Manganese and Iron are micronutrients required in trace amounts. Concentration of nitrogen in dry matter-15000 mg./ gm. Concentration of carbon in dry matter is 45,000 mg / gm.

The apical meristem of the root is present at all the root tips. Apical meristem is subterminal in position of the growing root tips and responsible for terminal growth of the root of plants.

Apical meristem  is located at the apex of stem, root and their branches and forms axillary bud & terminal bud. Intercalary meristems take part in linear growth. Lateral meristem occur parallel to the circumference of the organs. They increase girth of the plant.

At the site of infection, the infectious organism release some chemical to increase the flow of mast cells towards the inflammation site. Mast cell release histamine which increases the permeability of blood vessels at the site of inflammation so that more blood supply takes place. The site gets warm and red due to this.

Earthworms have no skeleton but during burrowing, anterior end becomes turgid and acts as a hydraulic skeleton. It is due to coelomic fluid. The coelom is filled with an alkaline milky coelomic fluid. This coelomic fliud contains water, salts, proteins and 4 types of cells namely amoebocytes, mucocytes, circular cells and chloragogen cells. 

Ciliated epithelium has simple columnar epithelial cells, but in addition, they posses fine hair-like outgrowths, cilia on their free surfaces. These cilia are capable of rapid, rhythmic, wavelike beatings in a certain direction. This movement of the cilia in a certain direction causes the mucus, which is secreted by the goblet cells, to move (flow or stream) in that direction. Ciliated epithelium is usually found in the air passages like the nose. It is also found in the uterus and fallopian tubes of females. The movement of the cilia propel the ovum to the uterus.

The kind of tissue that forms the supportive structure in our pinna (external ears) is also found in tip of the nose. External pinna is made up of elastic cartilage. It is passage towards middle ear.

Ciliated epithelium is usually found in the respiratory tract, fallopian tubes.

The break down of detritus into smaller particles by earthworm is known as fragmentation.

Chlorenchyma cells are those parenchymatous cell which contain chloroplast in them. They are capable of photosynthesis. A spore capsule of moss can perform photosynthesis, therefore chlorenchyma are present in them.

Cu⁺ = 29 – 1 = 28 e^– thus the electronic confingration of Cu⁺ is

The molecule which contains same number of electrons are called isoelectronic. eg.

The central pith is surrounded by xylem, phloem, pericycle and endodermis . The phloem occurs only outside the xylem e.g Equisetum, Osmunda.