All categories

3 years ago

Animal cells have all of the following except

1 answer:

5 0

B. Chloroplasts
Plant cells are the only cells that have them, because they take part in photosynthesis. Hence the chloroform, chloroplast.

You might be interested in

Which was not one of the changes in development and specialization that primitive mammals underwent? answers?

MrRissso [65]

One of the changes in development and specialization that did not happen in primitive mammals was the increase in stomach capacity. The specialization of teeth and the lower jaw are two important modifications of the primitive mammals. Also an increase in size and brain capacity are two crucial modifications of the early mammals.

7 0

3 years ago

Tropic of

Semmy [17]

I just woke him crying and he said I can’t he just got out here and I don’t know why I was just talking abt it and he was just trying so hard to sleep in his

4 0

2 years ago

Unusual ________________, sights, ___________, appearances or __________________ are often the first sign of an emergency ______

kolezko [41]

Answer: Unusual sounds or noises, sights,smells or odors, appearances or behaviors are often

the first sign of an emergency.

Bystander roles in an emergency may include giving first aid, calling 9-1-1 or the designated emergency number, or getting equipment

( for example: A first aid kit).

Explanation:

8 0

3 years ago

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

Which of the following is a reason that Venus is not ideal for supporting life?

Kryger [21]

Answer:

Venus is not ideal for supporting life because it has a thick atmosphere which causes extremely high temperatures.

Explanation:

Venus is the second planet near to the sun in solar system.
It is called the twin of Earth because of its almot similar size.
It completes one revolution in 225 days.
It is the hottest planet on in the solar system having temperature near 735 K which is more than mercury, the nearest planet to the sun.
The high temperatures of Venus results from its extremely dense and Carbon dioxide rich atmosphere. The atmosphere is surrounded by thick clouds of sulphuric acid that cause sulphuric acid rains.
It is known as evening star.

5 0

3 years ago