In cells, the energy available in food is used to make an energy-rich compound calleda.water
b. glucose
c. ATP
d. ADP

Answers

Answer 1

Answer: The answer is letter C. ATP.

ATP stands for Adenosine Triphosphate which is present in every cell’s cytoplasm and nucleoplasm which is essential in all the physiological mechanisms. It is considered as the energy currency of life or the “molecular unit of currency”. It stores the energy that we need every day to do our daily undertakings. The primary function of ATP is to transport chemical energy within the body cells for metabolism. It is said that 1 moleculte of ATP is composed of 3 phosphate groups.

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Dmitri Mendeleev and Henry Moseley developed their periodic tables about forty years apart. During that time, many discoveries in chemistry were made. Which fact was most likely discovered between the time of Mendeleev’s table and the time of Moseley’s table that helped Moseley develop his version? a. Atomic mass is the average mass of different samples of the same element. b. Different elements can have similar chemical properties even if their atomic masses are different. c. The number of protons in an atom is different than the atom’s total mass. d. Protons strongly affect an element’s atomic mass, while the electrons in atoms do not.

Answers

The fact that most likely discovered between the time of Mendeleev’s table and the time of Moseley’s table helped Moseley develop his version is as follows:

The number of protons in an atom is different than the atom’s total mass.

Thus, the correct option is C.

What is Mendeleev's periodic table?

Mendeleev's periodic table may be defined as a systematic positioning of elements on the basis of their increasing atomic mass in a table form. It also reflects similarities and fashion in the behavior of elements.

Mendeleev's periodic table helped Moseley to a major extent. All the drawbacks of Mendeleev's periodic table are shorted out by Moseley in a more efficient way.

One of them was that the number of protons in an atom is different than the atom’s total mass because the total atomic mass of an element depends on the number of protons, neutrons, and electrons. Altogether they constitute the element.

Therefore, the correct option for this question is C.

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Answer: The number of protons in an atom is different than the atom’s total mass.

Explanation: I had the test and got the answer correctly.

Assume that you transform bacteria with a plasmid containing an ampicillin-resistance gene. Instead of directly plating the transformed population as you did in this lab, you set up two liquid cultures of them, one that contains ampicillin and one that does not. You will then assay these cultures on plates at two different times: immediately after you set up the cultures, and then again after the bacteria have been in culture for an extended period. The assays will demonstrate the number of ampicillin-resistant vs. ampicillin-sensitive culture bacteria in each culture at each time. To perform each of the two assays, you prepare serial dilutions of the two cultures and plate them onto LB plates with and without ampicillin (the dilution) is simply to ensure that you will get some plates on which you can distinguish separate colonies).Describe what you expect to observe in the initial assay and in the second assay. What, if any, differences might you expect in terms of the ratios of ampicillin-resistant and nonresistant bacteria?

Answers

In the initial assay with ampicillin, there will still be, although in a smaller number, nonresistant bacteria that have survived incubation. After an extended period, ampicillin will kill all nonresistant bacteria and in the second assay, only ampicillin-resistant bacteria will survive.

A student placed a disk of filter paper in each of the following solutions: disinfectant 1, disinfectant 2, disinfectant 3, and distilled water. While the four disks were soaking in their respective solutions, she streaked a sterile nutrient agar dish with a culture of E. coli bacteria. Then, she placed each disk carefully onto the nutrient agar dish, placed the lid on the dish, taped it shut, and incubated the dish at 37°C for several days. The diagram shows how the nutrient agar dish looked on Day 1 and Day 4. The shaded portion of the plate on day 4 indicates the bacterial growth. What is the control in the experiment?a. Disk soaked in disinfectant 1
b. Disk soaked in disinfectant 3
c. Disk soaked in disinfectant 2
d. Disk soaked in distilled water

Answers

d. Disk soaked in distilled water

Experimentation is a scientific process wherein you test and verify a hypothesis based on its assumption is going to be supported or negated (null hypothesis). Hence experimentation involves the independent and dependent variable, also control variable as a level in the IV.

__________ species reproduce rapidly in a new habitat due to the lack of parasites and predators that would naturally control their population growth. A) Invasive B) Isolated C) Native D) Reproductive

Answers

An invasive species is defined as the organism that is not indigenous, or native, to a particular area. Invasive species can give rise to great economic and environmental harm to the new area.

What is native species?

Native species is defined as species which originated and developed in its surrounding habitat and has adapted to living in that particular environment.

Examples of invasive plant species are kudzu vine, English ivy, Japanese knotweed, etc. Animal examples are New Zealand mud snail, European rabbit, grey squirrel, carp, etc.

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Answer:invasive

Explanation:

What event occured during paleozoic era?A. diversification of mammals

B. beginning of multicelled life

C. first appearance of most invertebrates

D. dominance of non avian dinosaurs

Answers

Answer:

C) first appearance of most invertebrates.

Explanation:

The Cambrian Explosion occurred 542 mya. The earliest complex animals arose in the sea at the beginning of the Cambrian Explosion. It would take another half a billion years for mammals to rise. Multicellular life dates back 1.2 bya, but more cpomplex life, such as animals, did not occur until the Cambrian Explosion. In the beginning of the Cambrian Explosion, many soft-bodied animals, such as jellyfish and sea anemones appeared.

Answer:

Explanation:

First appearance of most invertebrates

What is the first step of protein synthesis?