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Nana76 [90]
3 years ago
14

4. How do dolphins search for food? How is this unique?

Biology
1 answer:
Sonja [21]3 years ago
6 0

Answer: This is known as eco-localization and when they emit these waves they reflect them in fish; that way they know exactly where they are.

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A forest has two groups of plants that appear to be very similar both phenotypically and genotypically. The major difference is
Gennadij [26K]
The basics would be that you'd need to find out if they could exchange genetic information. If not, they couldn't be considered part of one species. Set-up 2 artificial environments so both groups would produce pollen at the same time. Fertilise both plants with the other's pollen. Then fertilise the plants with pollen from their own group. 
Count the number of offspring each plant produces. 
If the plants which were fertilised by the opposite group produce offspring, they are of the same species. You can then take this further if they are of the same species by analysing if there is any difference between the number (and health) of offspring produced by the crossed progeny and by the pure progeny. You'd have to take into account that some of them would want to grow at different times, so a study of the progeny from their first sprout until death (whilst emulating the seasons in your ideal controlled environment). Their success could then be compared to that of the pure-bred individuals. 
Make sure to repeat this a few times, or have a number of plants to make sure your results are accurate. 
Or if you couldn't do the controlled environment thing, just keep some pollen one year and use it to fertilise the other group. 
I'd also put a hypothesis in there somewhere too. 
The independent variable would be the number of plants pollinated. The dependant variable would be the number of progeny (offspring) produced. 
5 0
4 years ago
PLEASE HELP! URGENT! Which is a correct interpretation of this cladogram?
Sergeeva-Olga [200]

Answer:

a

Explanation:

5 0
3 years ago
What are the intercellular communication types at a synapse? Select all that apply.
Anettt [7]

Answer: Option A and D.

Soups chemical synaptic transmission.

Sparks direct electrical transmission.

Explanation:

Intercellular communication refers to the communication and interaction that exists between two cells in the body. It could be hormonal or synaptic transmission.

Synapse is the site where electric nerve impulses are transmitted between two nerve impulses.

There are two synapse possibilities which are electrical and chemical.

The Sparks and soups mean that the scientific discovery over the transmission of nerve impulses as to whether they are electrical impulses (Sparks) or chemical impulses(soup).

Chemical synaptic transmission means there is no physical touch in the space chemical are released and move to the neighbouring cells.

Electrical transmission means neuron physically touch and give way for flow of impulses between cells.

6 0
3 years ago
Which statements describe thigmotropism? Check all that apply.
emmainna [20.7K]

Answer:

Thigmotropism is a plant's response to touch.

Thigmotropism is a plant's response to an external stimulus.

Thigmotropism can occur quickly or slowly.

Thigmotropism may involve the way in which a plant grows.

Thigmotropism may involve the closing and opening of plant leaves.

4 0
3 years ago
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An ecosystem that has a high level of _______ is able to fill all of its niches.
castortr0y [4]
Hmm. This one’s simple. It’s definitely biodiversity, because if there are lots of organisms, people can fulfill their niches easily. Carbon dioxide and pollution just harms the organisms and salt water doesn’t do much good, except in ocean ecosystems. The answer is C: Biodiversity.
4 0
4 years ago
Read 2 more answers
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