The step at which the researchers would do at the end of researching Edna is to amplify the amount of DNA.
Option (d);
<u>EXPLANATION:</u>
- The term EDNA means Environmental DNA.
- Invasive species in the waterway are the waterborne plants and animals who can likely cause effects to the human as well as the environment.
- If researchers want to use eDNA to look for invasive species in the waterway, they will first collect a sample.
- After cutting DNA into pieces, DNA would be precipitated in each sample.
- And in the end, the amount of DNA would be amplified in each sample to understand how it would cause harm to the environment.
Answer: 1. Sea urchins and sea otters
2. They are prey for carnivores.
3. Sea otters, star fish
Explanation:
Sea urchins and sea otters are carnivores as they eat on the flesh of starfish and sea urchins respectively.
Starfish feed on the kelp forests which are the producers in the food chain and the starfish is the primary consumer and prey for sea urchins. So, starfish and kelp forests are the prey in the marine ecosystem.
Keystone species is the one which controls the population of other inferior species in an ecosystem. Here, sea otters consume sea urchins so the population of sea urchins remained in control Starfish controls the population of kelp forest.
The network of glands that release chemical messengers directly into the bloodstream is called the endocrine system. The endocrine system produces and secretes t<span>hese chemical messengers, referred as </span>hormones directly into bloodstream to transmit signals to appropriate part of body. The hormones regulate bodily functions like growth, metabolism, <span>tissue function, sexual function, reproduction, </span>sleep and mood.
Answer: i think it’s C
Explanation: i’m taking the test rn and that’s what i’m gonna put, it’s the best answer
