1. rivers and streams 2. groundwater seepage
The hearts of birds and mammals, which have four chambers, are accurately classified as homoplasies. In evolutionary terms, homoplasies refer to traits that are shared across different species, even though their common ancestors lacked these traits entirely. To illustrate, both bird and bat wings perform a similar function of enabling flight, yet these structures evolved separately without being present in their ancestors. Consequently, while birds and mammals each have a four-chambered heart, their predecessors only possessed three chambers. This independent evolution exemplifies homoplasy.
The answer is B. Animal cells lack a cell wall, while the shoebox signifies the cell wall. I hope this information has been helpful![[TAG_1]]
Answer:
a. M_D_: 9/16 Individuals with black fur
b. M__dd: 3/16 Individuals with gray fur (1/16 MMdd + 2/16 Mmdd)
c. mmD_: 3/16 Individuals with brown fur (1/16 mmDD + 2/16 mmDd)
d. mmdd: 1/16 Individuals with gray fur.
Explanation:
Provided data includes:
- The dense pigment gene, D, corresponds to melanophilin.
- The D allele is dominant over d.
- The M/m gene determines pigment production.
- M is dominant over m.
- With D present, M/m is expressed.
- With dd, M/m is not expressed.
- DDMM, DdMM, DDMm, DdMm result in black fur.
- DDmm, Ddmm lead to brown fur.
- ddMM, ddMm yield light gray fur.
Cross: between two dihybrids
Parental: DdMm x DdMm
Phenotype: Black-furred x Black-furred
Gametes: DM, Dm, dM, dm; DM, Dm, dM, dm
Punnet Square: DM Dm dM dm
DM DDMM DDMm DdMM DdMm
Dm DDMm DDmm DdMm Ddmm
dM DdMM DdMm ddMM ddMm
dm DdMm Ddmm ddMm ddmm
F1: 9/16 Black-furred individuals, D-M- (1/16 DDMM + 2/16 DDMm + 2/16 DdMM + 4/16 DdMm)
3/16 Brown-furred individuals, D-mm (1/16 DDmm + 2/16 Ddmm)
4/16 Gray-furred individuals, dd-- (1/16 ddMM + 1/16 ddmm + 2/16 ddMm)
Characteristics likely included in a dichotomous key to identify insects are: has 6 or 8 legs, has or does not have wings, has one pair of wings or two pairs of wings. Dichotomous keys serve as biological guides that use a series of statements acting as clues to identify organisms.
