Biology, 06.07.2019 10:50 palomaresmitchelle

Daphnia are freshwater organisms sometimes referred to as “water fleas.” design an experiment that could be used to test the effects of temperature on the size of a daphnia population. in your experimental design, be sure to: • state a hypothesis to be tested • describe how the control group will be treated differently from the experimental group • identify the independent variable in the experiment • identify the type of data that will be collected

Answers: 1

Show answers

Answers

Hypothesis: Daphnias can increase in population at a room
temperature, rather than a colder or warmer temperature.

Control group will be at a room temperature water. The experimental will be tested in cold and warmer waters.

Independent variable: change of water temperature.

The data will be the amount of growth in which the water fleas population increases or decreases, a bar graph would work.

Answer from: Krch1401

Experiment to test the effect of temperature on the size of a daphnia population:

1. The hypothesis to be tested is: "Cooler temperature will reduce the size of the population due to a decrease in the reproduction rate while the hotter temperature will increase the size of the population due to an increase in the reproduction rate.

2. In all groups, daphnia will be counted weekly at the same time. The amount of water and nutrients supplies will be the same between groups. The only thing that will change is the temperature. For example:

Control group will be at 20 Celcius degrees, the cooler group will be at ten Celcius degrees, and the hotter group will be at 30 Celcius degrees.

3. The independent variable is the temperature.

4. The dependent variable (data that will be collected) is the size of the population.

Explanation:

Daphnias are microscopic crustaceans, which are called water fleas because of their saltatory behavior like fleas. Their life span and reproduction can be affected by different factors, including the abundance of predators, food, and temperature. They alternate their reproduction strategy during their life; they can reproduce asexually and sexually. Lower temperatures (cooler) decrease their metabolic and reproduction rate while higher temperature (hotter) increase their metabolic and reproduction rate. Because they can reproduce more times during their life span and the reproduction rate is higher in higher temperatures, I expect that temperature will affect the size of the population of Daphnia.

Answer from: Quest

ask your friends for what they got then copy it down if you don't have any friends which is fine than google it or pay the teacher

Answer from: Quest

Proteins are the workhorses of the cell, controlling virtually every reaction within as well as providing structure and serving as signals to other cells. proteins are long chains of amino acids , and the exact sequence of the amino acids determines the final structure and function of the protein. instructions for that sequence are encoded in genes . to make a particular protein, a messenger ribonucleic acid (mrna) copy is made from the gene (in the process called transcription ), and the mrna is transported to the ribosome . protein synthesis, also called translation , begins when the two ribosomal subunits link onto the mrna. this step, called initiation, is followed by elongation, in which successive amino acids are added to the growing chain, brought in by transfer rnas (trnas). in this step, the ribosome reads the nucleotides of mrna three by three, in units called codons , and matches each to three nucleotides on the trna, called the anticodon. finally, during termination, the ribosome unbinds from the mrna, and the amino acid chain goes on to be processed and folded to make the final, functional protein

Another question on Biology

Biology, 22.06.2019 04:00

What amino acid is coded for by this sequence after the mutation

Answers: 1

Answer

Biology, 22.06.2019 07:50

One function of the poly-a tail on eukaryotic mrna sequences is to the mrna be transported from the nucleus to the cytoplasm. prokaryotic mrna also has a poly-a tail. choose the best explanation of the prokaryotic poly-a tail. a. prokaryotic poly-a tails are composed of a different molecular structure compared with eukaryotic poly-a tails. b. prokaryotic poly-a tails have the same functions as eukaryotic poly-a tails, because this process is highly conserved throughout different species. c. prokaryotic poly-a tails aren't important, because prokaryotes don't have nuclei. d. prokaryotic poly-a tails have other functions,because prokaryotes don't have nuclei.

Answers: 3

Answer

Biology, 22.06.2019 08:10

Use the phylogenetic tree to the right to determine which statement below is true. organisms a and f are not related. organism e is more closely related to organism b than organism f. organisms c and d are more closely related than organisms a and b. phylogenetic trees

Answers: 2

Answer

Biology, 22.06.2019 11:30

Female luna moths (actias luna) attract males by emitting chemical signals that spread through the air. a male hundreds of meters away can detect these molecules and fly toward their source. the sensory organs responsible for this behavior are the comblike antennae visible in the photograph shown here. each filament of an antenna is equipped with thousands of receptor cells that detect the sex attractant. based on what you learned in this chapter, propose a hypothesis to account for the ability of the male moth to detect a specific molecule in the presence of many other molecules in the air. what predictions does your hypothesis make? design an experiment to test one of these predictions.

Answers: 1

Answer

You know the right answer?

Daphnia are freshwater organisms sometimes referred to as “water fleas.” design an experiment that c...

Questions