The glandular swelling is found on the back of the earthworm and is called C.litellum.
An earthworm is tube shaped and it belongs to the Annelida phylum. It is usually found in the soil, where it contribute to the level of fertility of the soil by feeding on the dead organic matter and by aerating the soil. Earthworms lack internal skeletons and they are hermaphrodites.
Answer:
is one in which blood flows through two capillary beds before being sent back to the heart.
Explanation:
A portal system can be defined as a system of blood vessels having a capillary network at each end, meaning that the blood vessel starts and ends in capillaries, before finding its way back to the heart. The blood draining through the capillary bed flows via the larger vessel to supply the blood to the another structure's capillary bed.
Answer:
Genetic drift Natural
Explanation:
In evolution, which driving factor most consistently requires a small population as a precondition for its occurrence? Genetic drift Natural In evolution, which driving factor most consistently requires a small population as a precondition for its occurrence? Genetic drift Natural selection Nonrandom mating Mutation.
Answer:
D
Explanation:
by process known as photolysis
Answer:
SsBB and SsBB
or
SsBB and SsBb
Explanation:
To produce a ratio of offspring where the number of short haired black offspring is three times that of the long haired black offspring. Since, the long haired offspring can only be inherited in the recessive manner in two copies, thus possible genotypes of the parents could be:
SsBB and SsBB
or
SsBB and SsBb
SsBB and SsBB
SB sB
SB SSBB SsBB
sB SsBB ssBB
3/4 short haired black offspring and 1/4 long haired black offspring
SsBB and SsBb
SB Sb sB sb
SB SSBB SSBb SsBB SsBb
sB SsBB SsBb ssBB ssBb
6/8=3/4 short haired black offspring and 2/4=1/4 long haired black offspring
