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3 years ago

Embryological studies suggest that the most ancient chordates were related to the ancestors of:

2 answers:

6 0

The answer is Echinoderms.

According to the Embryological studies, the most ancient chordates were closely related to the ancestors of the echinoderms. Echinoderms are members of the group Phylum Echinodermata of marine animals. Some known echinoderms are starfish, and sea cucumbers.

Korolek [52]3 years ago

6 0

The answer is Echinoderms.

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Which part(s) of a telephone involves the conversion of sound waves to electrical signals?

Sliva [168]

The correct answer is letter B. The microphone is the part of the telephone the converts sound waves into electrical signals that can be sent through the phone line and then towards the receiver on the other side. The telephone is one of the most important inventions made by man as it allowed communication to speed up through time.

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2 years ago

Which of the following is a characteristic by which viruses are classified?

liq [111]

Answer:

Type of nucleic acid.

Explanation:

Virus may be defined as the organism that can contains both DNA and RNA as their genetic material. Virus acts as non-living outside the host environment and later acts as living organism inside the host.

Some virus that particularly contain DNA as genetic material. Some virus has the ability to transform RNA into the DNA molecule. Some virus contains only RNA as their genetic material and DNA is not involved in their life cycle.

Thus, the correct answer is option (a).

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3 years ago

To further study anti-nAChR antibody function, the researchers wanted to replicate the experiments described in the passage in o

Aloiza [94]

Answer:

B/ Because the electrolyte rich baths were infused with in consistent amount of Ach.

Explanation:

Why B? Because the electrolyte rich baths were infused with in consistent amount of Ach. Used concentrations * Ach used, thus we get double the result.

Not A: Because the control need to be used.

Not C: Because autoimmune antibodies are transported to every tissue of body including skeletal muscle.

Not D: Mice and other rodents are often used as animal models.

3 0

3 years ago

How does interaction with birds help a flowering plant?

AlladinOne [14]

I think it is A because birds do help spread around the seeds hope i helped

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3 years ago

Read 2 more answers

What could a scientist do to determine what era the Eocene Period belongs to on the geologic time scale?

Burka [1]

Answer:

Option B) study information related to the Cenozoic era

Explanation:

The complete question is

Scientists discovered that the Eocene time period existed in Earths history around 34 MYA. What do they need to do to determine what time period Eocene belongs to on the geologic time scale?

A) learn what happened during Precambrian time

B) study information related to the Cenozoic era

C) view the timing of events in the Mesozoic era

D) research events that happened during the Paleozoic era

Solution -

The period of Eocene belong to the Cenozoic era. The Cenozoic era is divided into three periods-

a) The Paleogene – Existed between 65.5 to 23.03 million years ago

b) The Neogene - Existed between 23.03 to 2.6 million years ago

c) The Quaternary – Started some 2.6 million years ago and is continuing till present

The Paleogene is subdivided into three epochs –

A) The Paleocene – existed between 65.5 to 55.8 million years ago

B) The Eocene – existed between 55.8 to 33.9 million years ago and

C) The Oligocene – existed between 33.9 to 23.03 million years ago

Hence, studying about Cenozoic era will give information about the Eocene epoch

Hence, option B is correct

5 0

3 years ago