MULTIPLE CHOICE QUESTION Why do scientists think that cuttlefish
have the biggest brain to body ratio of all
invertebrates (animals without a spine)?

“to find the best hiding places when trying to avoid predators “

“to be able to swim really fast”

“to find their prey”

and “to have enough processing power to control their 20 million pigment cells”

To be able to swim really fast.

Explanation:

Cuttefish have many natural predators native to their waters so many of them need to swim fast to get away. Over the course have many years they have adapted to what they are today.

Marinebiology.org/cuttlefish

Paragraph 4

option a is correct i.e.

explanation:

in context to the membrane of nerve impulse, the outer membrane of neuron is semi permeable that is only sodium ions can pass through the membrane i.e. smaller ions can pass through the membrane while larger ions cannot pass through it.

we would need to see the picture to answer it