Which extraembryonic membrane in humans prevents desiccation of the embryo inside the uterus?
Chorion
Allantois
Yolk sac
Yolk sac
D.
Yolk sac
Amnion is an extraembryonic membrane that surrounds embryo in reptiles, birds and mammals. It provides a kind of private aquarium to the embryo and protects it from mechanical shock and desiccation.
Chorion (serosa) is the outermost extraembryonic membrane in reptiles, birds and mammals. It surrounds the whole embryonic system of the embryo.
Yolk sac contains yolk in reptiles and birds. In mammals yolk, the sac is also known as a umnillical vesicle. It is connected to enter on of the embryo by a slender yolk stalk.
Allantois functions as an embryonic urinary bladder or as a respiratory extension of a handgun in reptiles and birds. In mammals, it is modified to carry blood vessel to and from the placenta.
Modern detergents contain enzyme preparations of
acidophiles
alkaliphiles
thermoacidophiles
thermoacidophiles
Unisexuality of flowers prevents
autogamy, but not geitonogamy
Both geitonogamy and xenogamy
geitonogamy, but not xenogamy
geitonogamy, but not xenogamy
According to central pollution control Board (CPCB), which particulate size in diameter (n micrometres) of the air pollutants is responsible for greatest harm to human health?
2.5 or less
1.5 or less
1.0 or less
1.0 or less
Which one of the following pairs of codons is correctly matched with their function or the signal for the particular amino acid?
GUU, GCU - Alanine
UAG, UGA - stop
AUG, ACG - start/ methionine
AUG, ACG - start/ methionine
Which one of the following is the correct statement regarding the particular psychotropic drug specified
Hashish cause alter thought perceptions and hallucinations
Opium stimulates nervous system and cause hallucinations
Morphine leds to delusions and disturbed emotions
Morphine leds to delusions and disturbed emotions
Which one of the following pairs of organs includes only the endocrine glands?
Parathyroid and adrenal
Pancreas and parathyroid
Thymus and testes
Thymus and testes
Bacterial leaf blight of rice is caused by a species of
Xanthomonas
Pseudomonas
Alternaria
Alternaria
Consider the following four measure (A-D) that could be taken to successfully grow chickpea in an area where bacterial blight disease is common
A) spray with Bordeaux mixture
B) control of the insect vector of the disease pathogen
C) Use of only disease-free seeds
D) Use of varieties resistant to the disease
Which two fo the above measures can control the disease?
B and C
A and B
C and D
C and D
