Answer:
9:3:3:1
Explanation:
In the given question, the two genes are unlinked which are controlled by dominant and recessive allele.
<u>Trait- Ear curling</u>
1. Curled ears- C, genotype will be- CC or Cc
2. Normal ears-c, genotype will be- cc
<u>Trait- color</u>
1. Black colour- B,genotype will be- BB or Bb
2. Grey colour- b, genotype will be- bb
Now, if cross between heterozygote will be performed
CcBb x CcBb
then allele will be CB, Cb, cB and cb
Now punnett square cross will be-
M/F CB Cb cB cb
CB CCBB CCBb CCBb CcBb
Cb CCBb CCbb CcBb Ccbb
cB CcBb Ccbb ccBb ccBb
cb CcBb Ccbb ccBb ccbb
On the basis of this phenotypic ratio will be-
- 9 black and curled
- 3 black not curled
- 3 brown and curled
- 1 brown and not curled
Thus, 9:3:3:1 is correct.
<span>C) the force of gravity</span>
Answer:
Invasive species in time destory biodiversity of an ecosystems
Explanation:
So lets go over what each answer is:
Invasive species are species that invade a ecosystem, and can harm other species and take over resources.
Populatiuons are what make up an ecosystem. There are many populations in a single ecosystem.
Biotic factors are the living things found in the world.
Abiotic factors are the opposite, being the nonliving things found in the world.
Looking at these, which would eventually destroy the biodiversity(variation of species) of an ecosystem?
This would be invasive species, for it is the only answer that harms it's ecosystem.
And this is correct, for invasive species often times can cause extiction of species, or even whole ecosystems.
For example of an invasive species, if a tree-consuming and widly reporudcing insect that lives in plains, invades a pine forest, it will eventually kill off all the trees in the area.
This wont only kill off the pine trees, but harms and could potentiallu kill the species that depend on the pine trees for survival.
Answer: invasive speices.
Hope this helps!