Question

Please help me soon!!!! 20 POINTS!! Thanks in advance!!!

Answer 1

Image 1 -

The producers are always the basis of an ecosystem. If they go missing, everything will be affected. In this case, a marine producer was affected by pollution, phytoplankton. The organisms that fed on them will be affected (marsh snails) and also the organisms that fed on the primary consumers (painted turtles).

Answer:

D.

Image 2 -

So, the info we have is that 45 chickes carry the dominant trait (100% chance). 30 have 1 allele of the recessive trait (50% chance). And 25 chickes carry the recessive trait (100% chance).

In this fraction, since we want to calculate the frequency of the recessive alleles, we'll put all the chickes that have 1 or 2 recessive alleles as the numerator. And the denominator will be the total of chickens. So, our fraction will be like this:

$\frac{25 + 30}{25 + 30 + 45} = \frac{55}{100}$

Answer:

C.

Image 3 -

Overfishing is a catastrophic event for the fish population, which means it will cause an effect on the fish population, known as the bottlneck effect.

What does a bottleneck look like? It is wide at the bottom and straightens on top. After it straightens, thing won't be the same because a genetic modification will take place. How? Reducing the genetic diversity.

Answer:

B.

Image 4 -

Animals guide themselves through behavioral isolation. So, they know when a cricket of the same species is calling them or when the signals coming from a dragonfly are from the same species.  

Mechanical isolation something else that only us humans have studied. Animals don't understand it and it is kind of useless to them. Only we know if reprodutive organs match or if two snail species can or cannot mate.

Answer:

The snail and reproductive organs examples go in "Mechanical Isolation".

The cricket and the dragonfly examples go in "Behavioral Isolation".

Image 5 -

The three types of adaptations could be explained and broken down like this:

Structural - a trait in an organism.

Behavioral - a response in an organism.

Functional - a process in an organism.

So, answers:

Behavioural - it's a specific way of behaving.

Structural - it's a structure/trait developed by the organism.

Structural - it's a structure/trait developde by the organism.

Behavioural - it's a specific way of behaving.

Behavioural - it's a specific way of behaving (to stimulus)

Functional - it's a specific process that occurs with specific function (protection)

Hope it helped,

BioTeacher101