Which of these animal groups was NOT present by the end of the Cambrian? bryozoans arthropods chordates mollusks

Answers

Answer 1

Answer: Only phylum bryozoans were not present during Cambrian period. It is an extensive fossil that did not appear in Cambrian nor pre-cambrian rocks. Bryozoans are found in the early Ordovician period. It could have probably existed during the Cambrian period but were soft-bodied or not preserved.

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Which part of the body is like a mixer?

Answers

Answer:

The mouth and teeth break up the food and mix it with saliva.

Answer:

stomach

Explanation:

The stomach is like a mixer, churning and mashing together all the small balls of food that came down the esophagus into smaller and smaller pieces. It does this with help from the strong muscles in the walls of the stomach and gastric (say: GAS-trik) juices that also come from the stomach's walls.

Select the word that best fits the definition: Economic activity characterized by fluctuating levels of growth and declinea. job security
b. interest rate
c. economy
d. business cycle

Answers

Answer:

Business cycle

Explanation:

The business cycle can be known as economic cycle is the cycle in which the gross domestic product can be seen moving in upward and downward direction.

The length of this cycle is the period in which consists of single boom and contraction sequence.

It shows the fluctuating levels of growth and decline in the economy.

economy maybe because it has the word economic in it

What is often the first amino acid added to a polypeptide chain? (Codon = AUG)

Answers

Answer:

Methionine

Explanation:

What can be said about prokaryotes and eukaroytes?a. Prokaryotes always have a nucleus, but eukaryotes don't.
b. Both of these cell types contain a nucleus.
c. Eukaryotes always have a cell membrane, but prokaryotes don't.
d. Both of these cell types contain genetic material.

Answers

Eukaryotes always have a cell membrane, but prokaryotes don't. Eukaryotic and Prokaryotic cells are bothbuilding blocks of life in different organisms. The main difference of two isin its structures. Eukaryotic cells contain organelles that are foundinside membranes, like the nucleus, which stores chromosomes and DNA.Prokaryotic cells don't have a nucleus and no true chromosomes. Prokaryotic cellsare unicellular while eukaryotes are multicellular. The presence ofmitochondria, chloroplasts, and cell wall are all distinct to Eukaryotic cells.Eukaryotic cells are found in animals and plants, while bacteria and archaeahave prokaryotic cells.

In terms of existence, prokaryotes have been onEarth for millions of years; while eukrayotic cells have come to existencethrough the process of evolution.

The political party in the twentieth century that generally opposed government expansion to solve social problems is the ____ Party.

Answers

The political party in the twentieth century that generally opposed government expansion to solve social problems is the Republican Party. I hope this is the answer that you are looking for and it comes to your help.

Republican Party or Grand Old Party (GOP).

The political party in the twentieth century that generally opposed government expansion to solve social problems is the Republican Party.

Republican Party in the twentieth century generally opposed government expansion to solve social problems because during the time the party came to be associated with Conservation Social Policies. The party opposed the government regulation of economy as well as government funded social programs.

A random-digit dialed survey conducted in the city of long beach, california reported that a greater proportion of nonsmokers endorsed a ban on smoking in alcohol-serving establishments than did smokers. What type of study design was this?

Answers

Answer:

The correct answer is case-control study.

Explanation:

In a case-control study, two groups of the population are used, in which one group is kept as control, and the other is known as the experimental group that encounters with a specific disease or an outcome. With the help of this study, one can expose the groups to various or single outcomes.

In the given case, a study is done in which an advertisement on a ban on smoking is encouraged by the non-smokers at the alcohol sale points but not by smokers, in the process a random digit dialing method was used. This random digit dialing method is an illustration of a case-control study, in which the survey of the individuals is done regarding the ban on smoking.

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A marine biologist wants to investigate the effect of ocean tides on certain aquatic ecosystems. Can this be studied by the scientific method?

Select all that apply.Which fungi are used in medicine? yeast penicillium aspergillus Rhizopus stolonifera