Question

Question 34

All chordates possess a backbone.

True

False

Question 35

Homo sapiens are an 'r-selected' species.

True

False

Question 36

Predators (secondary consumers) can convert between 60-70% of the energy available in the primary consumer class into biomass themselves.

True

False

Answer 1

34) The statement is -

False.

This is because chordates are classified into three major subphyla. They are- Vertebrata, Urochordata, and Cephalochordata. Vertebrates are the chordates which have a backbone. The other two subphyla are invertebrate chordates. These two lack a backbone. Members of the subphylum Urochordata are tunicates.

35) The statement is-

False.

There are two evolutionary strateges- R selection and K selection. R selection species produce lots of offsprings and live in unstable environment have lower probability of survival whereas the K selective offsprings produce less offsprings and live in stable environment have higher probability of survival.

Homo sapiens are K selective.

36) The statement is-

False.

According to the 10% law, predators (secondary consumers) can convert between 10% of the energy available in the primary consumer class into biomass themselves.