Which of the Following Is Believed to Make Up Most

question 46

Multiple Choice

Which of the following is believed to make up most of the extended galactic halo?

• A)dark matter
• B)faint brown dwarfs
• C)G, K, and M stars
• D)globular clusters

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Definitions:

Neural Tube

Structure in the early stage of brain development from which the brain and spinal cord develop.

Prenatal Development

The process of growth and development within the womb, where a single-cell zygote (the result of fertilization) becomes an embryo, then a fetus, and undergoes various developmental stages before birth.

Zygote

The initial cell formed when a sperm cell fertilizes an egg cell, representing the earliest stage of embryonic development.

Primitive Brain

Refers to the brain structures involved in basic survival functions, often equated with the brainstem and limbic system.