brodidit for students
ہوم / مشق / ایم ڈی کیٹ / حیاتیات / ارتقا اور ماحولیات
ارتقا اور ماحولیات
6 سوالات: ایم ڈی کیٹ حیاتیات، جوابات اور وضاحت کے ساتھ۔
-
The theory of evolution by natural selection was proposed by Alfred Wallace and:
- 1 Gregor Mendel
- 2 Charles Darwin
- 3 Louis Pasteur
- 4 Robert Hooke
جواب دیکھیں
درست جواب: Charles Darwin
Darwin and Wallace presented the idea together in 1858. Darwin set it out in full in On the Origin of Species.
-
Roughly what percentage of energy is passed on from one trophic level to the next?
- 1 1%
- 2 10%
- 3 50%
- 4 90%
جواب دیکھیں
درست جواب: 10%
Most energy is lost as heat and in life processes, so only about 10% reaches the next level.
-
The human arm and a whale's flipper are examples of:
- 1 Analogous structures
- 2 Vestigial structures
- 3 Homologous structures
- 4 Convergent traits
جواب دیکھیں
درست جواب: Homologous structures
They have the same basic bone plan from a common ancestor but do different jobs, which makes them homologous.
-
In a population in Hardy-Weinberg equilibrium, q squared is 0.04. What is the frequency of heterozygotes (2pq)?
- 1 0.16
- 2 0.32
- 3 0.64
- 4 0.96
-
Nitrogen-fixing bacteria in the root nodules of legumes belong to the genus:
- 1 Rhizobium
- 2 Nitrosomonas
- 3 Escherichia
- 4 Streptococcus
جواب دیکھیں
درست جواب: Rhizobium
Rhizobium lives in root nodules and turns nitrogen gas into ammonia that the plant can use.
-
Which of these is a producer in a food chain?
- 1 Grass
- 2 Rabbit
- 3 Fungus
- 4 Hawk
جواب دیکھیں
درست جواب: Grass
Producers make their own food by photosynthesis. Grass is a producer, while rabbits and hawks are consumers and fungi are decomposers.