Download App

Reproduction in Lower and Higher Animals — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYReproduction in Lower and Higher Animals4 Marks
Question
Distinguish between: Graafian follicle and Corpus luteum.
✓

Answer

Graafian follicleCorpus luteum
1. Graafian follicle is produced by the maturation of the primary follicle.1. Corpus luteum is produced by the cells of ruptured Graafian follicle.
2. It is formed in the ovary before ovulation.2. It is formed in the ovary after ovulation.
3. It produces the hormone estrogen.3. It produces the hormone progesterone.
4. It has secondary oocyte surrounded by follicle cells.4. It has only follicle cells.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Case study (4 Marks)" from Reproduction in Lower and Higher Animals→Reproduction in Lower and Higher Animals — all question types→BIOLOGY STD 12 Science question papers→Maharashtra Board STD 12 Science question papers→Maharashtra Board question paper generator→

Similar questions

Read the following and answer any four questions from (i) to (v) given below:
Mutation explains the relationship between gene and DNA. The effects of large deletions and rearrangement in a segment of DNA results in loss or gain of gene and its function. Insertion or deletion of one or two bases changes the reading frame from the point of insertion or deletion. A classical example of point mutation is a change of single base pair in the gene for beta globin chain that results in change of amino acid residue glutamate to valine and results into a diseased condition called sickle cell anaemia.
  1. A mutation is a change produced by an alteration in the genetic mechanism and.
  1. May arise spontaneously.
  2. Is always induced by the environment.
  3. Is never advantageous.
  4. Is not inherited.
  1. The DNA code for glutamic acid is CTC or CTT. The code for valine is CAA or CAT. In sickle cell haemoglobin, valine is present instead of glutamic acid.
Assuming a single base pair substitution has occurred, what is the mRNA code in the affected mutant?
  1. CUU
  2. GAA
  3. GAG
  4. GUA
  1. A mutation involving the substitution of one nitrogenous base for another has altered the base sequence of a DNA molecule, coding for four amino acids, as shown below.
Normal A-G-C-A-T-G-G-A-T-C-C-T

Mutant A-G-C-A-T-G-C-A-T-C-C-T
The table shows six codons and the corresponding amino acids into which each is translated.
mRNA codon
Amino acid
AAG
Lysine
CUA
Leucine
GGA
Glycine
GUA
Valine
UAC
Tyrosine
UCG
Serine
The mutation has changed the amino acid.
  1. Leucine to valine.
  2. Lysine to glycine.
  3. Serine to leucine.
  4. Tyrosine to lysine.
  1. Assertion : Insertion or deletion of three or its multiple bases, insert or delete one or multiple codons and so one or multiple amino acids.
Reason: Reading frame remains unaltered with insertion or deletion of three or its multiple bases.
  1. Both assertion and reason are true, and reason is the correct explanation of assertion.
  2. Both assertion and reason are true, but reason is not the correct explanation of assertion.
  3. Assertion is true, but reason is false.
  4. Both assertion and reason are false.
  1. Part of the amino acid sequences in normal and sickle cell haemoglobin are shown.
Normal haemoglobin Sickle cell haemoglobin
Thr-Pro-Glu-Glu Thr-Pro-Val-Glu
mRNA codons for these amino acids are
Glutamine (Glu) GAA GAG
Praline (Pro) CCU CCC
Threonine (Thr) ACU ACC
Valine (Val) GUA GUG
Which transfer RNA molecule is involved in the formation of this part of the sickle cell haemoglobin?
→
The bacterium Bacillus thuringiensis is widely used in contemporary biology as:
  1. Agent for production of dairy products.
  2. Source of industrial enzyme.
  3. Indicator of water pollution.
  4. Insecticide.
→
Distinguish between : Pharynx and Larynx.
→
Read the following and answer any four questions from (i) to (v) given below:
Population is defined as the total number of individuals of a species present in a particular area at a given time. 'The scientific study of human population is called demography. The rapid increase in population over a relatively short period is called population explosion. Four basic processes are involved in increase or decrease in the population size. Population shows two types of growth; exponential and logistic.
  1. Which of the following factors are responsible for population explosion?
  1. Decrease in number of people of reproducible age.
  2. Decline in infant mortality rate.
  3. Increase in maternal mortality rate.
  4. Rapid decline in death rate.
  1. A and B
  2. B and C
  3. B and D
  4. A and D
  1. What is the shape of curve showing logistic growth?
  1. Sigmoid.
  2. J-shape.
  3. Linear.
  4. Hyperbola.
  1. What is immigration?
  1. Number of individuals of the population who left the habitat.
  2. Number of individuals that have come into the habitat.
  3. Number of individuals of a species per unit area at given time.
  4. Number of births per 1000 individuals.
  1. Equation of Verhulst-Pearl logistic growth is:
  1. $\frac{\text{dN}}{\text{dt}}=\text{rN}$
  2. $\frac{\text{dN}}{\text{dt}}=\frac{\text{K-N}}{\text{k}}$
  3. $\frac{\text{dN}}{\text{dt}}=\text{rN}\Big(\frac{\text{K-N}}{\text{k}}\Big)$
  4. $\frac{\text{dN}}{\text{dt}}=\text{rN}\Big(1-\frac{\text{K-N}}{\text{k}}\Big)\text{r}$
  1. Which of the following contributes to decrease in population?
  1. Fertility.
  2. Natality.
  3. Social mobility.
  4. Emigration.
→
Read the following and answer any four questions from (i) to (v) given below:
Medical termination of pregnancy is termination of pregnancy before the fetus become viable. To reduce the incidence of illegal abortion and consequent maternal mortality, MTP Amendment Act, 2017 was enacted by the government of India. About 40-50 million MTPs are done in a year all over the world.
  1. Abortion can be safely done for about ______ weeks of pregnancy.
  1. 4
  2. 12
  3. 8-10
  4. 15-18
  1. How is MTP helpful in decreasing human population?
  1. By aborting normal female fetus.
  2. By aborting normal female fetus.
  3. By getting rid of unwanted pregnancies.
  4. None of these.
  1. Select an incorrect statement for MTP.
  1. Second trimester abortions are more risky than first trimester.
  2. It is being misused to abort normal female fetus.
  3. It helps to get rid of unwanted pregnancies.
  4. Child detected with congenital heart disease cannot be aborted.
  1. MTP was legalised by Government of India in:
  1. 1971
  2. 1982
  3. 1973
  4. 1991
  1. Assertion: MTPs are safe during first trimester of pregnancy.
Reason: After first trimester, fetus become intimately associated with the maternal tissues.
  1. Both assertion and reason are true, and reason is the correct explanation of assertion.
  2. Both assertion and reason are true, but reason is not the correct explanation of assertion.
  3. Assertion is true, but reason is false.
  4. Both assertion and reason are false.
→
Column AColumn B (Organisms)
1. Symbiotic nitrogen fixationa. Nitrobacter
2. Denitrificationb. Cyanobacteria
3. Free living nitrogen fixersc. Rhizobium
4. Nitrificationd. Paracoccus
→
Column AColumn B
(1) Rooted floating angiosperm(a) Cyperus
(2) Free-floating plant(b) Typha
(3) Reed swamp(c) Pistia
(4) Marsh-meadow(d) Lotus
→
DiseaseSymptoms
(1) Asthma(a) Fully blown out alveoli
(2) Bronchitis(b) Inflammation of lungs with cough and fever
(3) Emphysema(c) Spasm of Bronchial muscles
(4) Pneumonia(d) Inflammation of bronchi
→
Column AColumn B
(1) Use of measuring scale(a) Record of primary growth
(2) Crescograph(b) Increase in height of plant
(3) Auxanometer(c) Measure growth in field
(4) Horizontal microscope(d) Measurement of linear growth of shoot
→
Distinguish between: m-RNA, t-RNA and r-RNA.
→