Which variable stars have pulsation periods between 1.5 hours and 1.2 days?A. Protostars
B. Nebulas
C. RR Lyrae variables
D. Cepheid variables

Answers

Answer 1

Answer: C. RR Lyrae variables

RR Lyrae variables are variable stars that have pulsation periods of 1.5 hours to 1.2 days.

Nebula is the cloud of interstellar dust and gas that forms a star. It is collborately shaped during colliding and collapsing of the interstellar mediums this is influenced by the gravitational attraction of the atoms and particles in the entites. Hence, there are three types of nebular namely, are classical nebula, diffuse nebula, planetary nebular and supernova remnants.

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Describe how deforestation might contribute to global warming.
Transcription makes a complementary _______ strand of the DNA. a. RNA b. DNA c. peptide d. none of the above
What is the main energy molecule in the body?
Where is the majority of energy stored in a molecule of atp?
A pregnant woman urinates more often than usual becuase the uterus compresses the bladder, and she must also dispose of fetal metabolic wastes.

Which class of organisms gather their energy directly from the sun? a. autotrophs b. carnivores c. herbivores d. detritivores

Answers

Answer:

The correct answer would be a. autotrophs.

Autotrophs, also called producers are the organisms which are able to produce complex organic compounds such as fats, proteins and carbohydrates from simpler substances present in the environment.

They are of two types based on their source of energy:

Photoautotrophs: These are the organisms which use sunlight as the source of energy in order to produce organic compounds.

For example, green plants synthesize their own food (glucose) from carbon dioxide with the help of sunlight and chlorophyll. Oxygen is released as the byproduct. The overall process is termed as photosynthesis (photo meaning photon or light energy).

Chemoautotrophs: They get energy from electron donor compounds such as sulfur, hydrogen sulfide et cetera.

The answer A. autotrophs

What are the number of vertebrae in each section of the vertebral column

Answers

Answer: the vertebral column is made up of 5 sections of individual bones. There are 7 cervical vertebrae, 12 thoracic vertebrae, 5 lumbar vertebrae, 1 sacral bone and the coccyx

Explanation: .

Linn abuse used the____ language in his two-word naming system

Answers

The answer is binomial nomenclature , also called binary nomenclature

During cellular respiration, every living thing in this food web uses ______ gas and releases ______ back into the environment. A. carbon dioxide: oxygen
B. oxygen: carbon dioxide
C. carbon dioxide: hydrogen
D. carbon dioxide: water vapor

Answers

During cellular respiration, every living thing in this food web uses B. oxygen gas and releases carbon dioxide back into the environment.
Plants are the only living things that do quite the opposite.

B. Oxygen; carbon dioxide. Animals breathe in oxygen and release carbon dioxide.

1. What do most industries and power plants use for energy?a. VOCs
c.sulfur dioxide
b. nitrogen oxide
d. fossil fuels

Answers

Answer:

D, Fossil fuels

Explanation:

Many industries and power plants that generate our electricity must burn fuel to get the energy they need. They usually burn fossil fuels. Burning fossil fuels releases huge quantities of sulfur dioxide and nitrogen oxide into the air.

The amount of food consumed in one eating occasion is termed the