Level 4
02
What is a structure that has no apparent
function and appears to be a residual part
from a past ancestor?
ITALIA
Pelvis
A. Fossil
B. Homologous
1 C. Vestigial
U D. Dichotomous
- Femur

Option C) Vestigial

Explanation:

A vestigial parts are the body parts that are shared with a common ancestor specie and have been modified to work in different ways because of changes in the mode of life.

Examples of vestigial parts in humans include:

- the appendix, which functions as caecum in herbivores

- mammary glands, which is well developed in women but not so developed in men

ecological efficiency: % of usable energy transferred as

biomass from one trophic level to the next typical is 10% efficient (90% of

energy is lost),is diagramed as the pyramid of energy flow. then osprey eagle

are tertiary consumer and the shrimp are primary consumer, so to balance

mass of shrimp (1/0.1) / 0.1 = 100 kg 

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.