Tag: zoology

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Questions Related to zoology

Multiple choice zoology menustral cycle in human parturition and lactation pregnancy and birth fertilization and post fertilization in humans

Choose the correct answers from the alternatives given.
Which of the germ layers is best associated with development Of the heart?

  1. Ectoderm

  2. Mesoderm

  3. Endoderm

  4. All of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The ectoderm, which is made up of columnar cells, forms the epidermis of the skin, nervous system, cornea, lens, retina, salivary glands and the enamel of teeth. The mesoderm gives rise to the dermis of skin, gonads, heart, blood and lymph, kidney, reproductive ducts and most of the muscles. The last layer, the endoderm gives rise to the gastric and intestinal glands, liver, pancreas, lining of the middle ear.

So the correct option is 'Mesoderm'.

Multiple choice zoology menustral cycle in human parturition and lactation pregnancy and birth fertilization and post fertilization in humans

The fluid released from the vagina lust prior to childbirth is

  1. Baby's accumulated urine

  2. Amniotic fluid

  3. Mothers plasma from the umbilical cord

  4. Baby's plasma from its fetal circulation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The amniotic fluid is the protective liquid contained by the amniotic sac of a gravid amniote. This fluid serves as a cushion for the growing fetus but also serves to facilitate the exchange of nutrients, water, and biochemical products between mother and fetus. Amniotic fluid is present from the formation of the gestational sac. The forewaters are released when the amnion ruptures prior to childbirth.

So the correct option is 'amniotic fluid'.

Multiple choice zoology menustral cycle in human parturition and lactation pregnancy and birth fertilization and post fertilization in humans

During parturition which joint allows smooth movement of the foetus?

  1. Amphiarthrosis

  2. Syndesmoses

  3. Pubicsmphysis

  4. Gomphosis
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

During pregnancy in the human, hormones such as relaxin allows the pelvic bones to be more flexible for delivery. The gap of the symphysis pubis, normally is 4–5 mm but during pregnancy there is an increase by at least 2–3 mm. The symphysis pubis separates to some degree during childbirth hence pubic symphysis is an amphiarthrodial joint.

So, the correct option is 'Amphiarthrosis'.

Multiple choice zoology menustral cycle in human parturition and lactation pregnancy and birth fertilization and post fertilization in humans

Milk secretion is caused by :-

  1. Progesterone

  2. PRH

  3. PRL

  4. Oxytocin
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Oxytocin is a peptide hormone secreted by the posterior pituitary. It is also a neuropeptide, used for inter-neuron communication. This hormone is responsible for secretion or ejection of milk. PRH or prolactin releasing hormone is responsible for the release of Prolactin or PRL, which is a hormone responsible for milk production. Progesterone inhibits lactation during pregnancy.

So, the correct option is 'Oxytocin'.

Multiple choice zoology menustral cycle in human parturition and lactation pregnancy and birth fertilization and post fertilization in humans

What is "After birth" referred to?

  1. Amniotic fluid passing out

  2. Expulsion of baby

  3. Expulsion of placenta, umbilical cord and foetal membrane

  4. Secretion of hormone relaxin
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In medical terms, the third stage of labor is known as the afterbirth. This stage involves the expulsion of the placenta, umbilical cord, and fetal membranes after the baby has been delivered.

Multiple choice zoology global environmental change causes of greenhouse effect global warming adaptation in animals

Which of the following are the correct approaches to reduce global warming ?
(i)   Use of fossil fuels 
(ii)   Improving efficiency of energy usage 
(iii)  Afforestation
(iv)  Increasing growth of human population

  1. (i) and (ii)

  2. (ii) and (iii)

  3. (iii) and (iv)

  4. (i), (ii) and (iii)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

To reduce global warming following measures must be taken:
(i)  cutting down the use of fossil fuel
(ii)  Improving efficiency of energy usage
(iii) Reducing deforestation
(iv) Planting trees and slowing down the growth of human population.

Multiple choice zoology global environmental change causes of greenhouse effect global warming adaptation in animals

In the event of global warming, which one of the following is most likely to occur?

  1. Existing plant and animal communities will move North in response to warming.

  2. Agriculture in the prairie provinces will be redeveloped on soils of the Canadian Shield.

  3. The anticipated rise in sea level will be caused primarily by the melting of polar ice caps.

  4. The decomposition of organic matter in the unfrozen surface layer of polar soils will increase.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
It is believed that increase in concentration of greenhouse gases has resulted in rise of atmospheric temperature which is slight in tropics, moderate in middle latitudes and maximum in polar regions. Global warming could raise sea level due to thermal expansion of sea water, melting of glaciers and Greenland ice sheet. There is a danger of submersion of large area as one third of human population lives within 60 km of coastline. Coastal salt marshes and estuaries, wetlands, drylands, freshwater supplies, fisheries, fish breeding areas and other types of wildlife will undergo extinction.
So, the correct answer is 'The anticipated rise in sea level will be caused primarily by the melting of polar ice caps'.
Multiple choice zoology global environmental change causes of greenhouse effect global warming adaptation in animals

Which of the following would happen in the presence of greenhouse effect in the atmosphere?

  1. Pollution will increase

  2. The earth's surface temperature will increase

  3. The earth's surface temperature remains the same,

  4. The depleted ozone layer will decrease the earth's temperature.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Greenhouse gas like co$ _2$, methane, CFC absorbs the radiation reflected from the earth's surface in the form of heat and increases the atmosphere's temperature is called as greenhouse effect which leads to the global warming.

Multiple choice zoology global environmental change causes of greenhouse effect global warming adaptation in animals

If global warming continues, organism facing severe threat is?

  1. Banana

  2. Dolphin

  3. Cow

  4. Snow Leopard
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Global warming is the continuous increase in temperature of earth's surface due to increase in concentration of greenhouse gases. The rise in temperature leads to melting of polar ice caps and this will lead to rise in sea level, due to which many coastal areas will get submerged.
Hence, if global warming continues, Snow Leopard will face severe threat as ice will melt due to global warming and its natural habitat will get destroyed.
So, the correct answer is 'Snow Leopard'.