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ladessa [460]
2 years ago
5

Darwin's next insight was to compare process in nature to artificial selection. By doing so, he developed a scientific hypothesi

s to explain how evolution occurs. This is where Darwin made his ______ contribution and his strongest break with the past.
Biology
1 answer:
antiseptic1488 [7]2 years ago
8 0
Is it first?

Explanation:

Darwin first major break through was finding natural selection by using the pea pod method and noticing how some were yellow and some were green with different textures.
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Explain why humans are a system of systems. Provide at least one example in your explanation.
valentinak56 [21]

Answer:The human body is made up of several organ systems that work together as one unit. In the pyramid of life that organizes all of the elements of life into categories, organ systems are nested between an organism and its organs. Organ systems are the groups of organs that are within an organism.

Ten major organ systems of the human body are listed below along with the major organs or structures that are associated with each system. Each system depends on the others, either directly or indirectly, to keep the body functioning normally.

Explanation:

Circulatory System: The main function of the circulatory system is to transport nutrients and gasses to cells and tissues throughout the body

Digestive System: breaks down food polymers into smaller molecules to provide energy for the body.

Endocrine System regulates vital processes in the body including growth, homeostasis, metabolism, and sexual development. Endocrine organs secrete hormones to regulate body processes

Urinary Excretory System: removes wastes and maintains water balance in the body. Other aspects of its function include regulating electrolytes in body fluids and maintaining normal pH of the blood.

Skeletal System: supports and protects the body while giving it shape and form. The major structures include 206 bones, joints, ligaments, tendons, and cartilage.

Respiratory System: provides the body with oxygen via a gas exchange between air from the outside environment and gases in the blood.

Reproductive System: enables the production of offspring through sexual reproduction between a male and female.

Nervous System: monitors and coordinates internal organ function and responds to changes in the external environment.

Muscular System: enables movement through the contraction of muscles. Humans have three types of muscles: heart muscle, smooth muscle, and skeletal muscles.

Integumentary System: protects the internal structures of the body from damage, prevents dehydration, stores fat, and produces vitamins and hormones. The structures that support the integumentary system include skin, nails, hair, and sweat glands.

6 0
2 years ago
Describe why translation of an mrna can start before transcription of the mrna is complete in prokaryotes but not in eukaryotes.
Lera25 [3.4K]

Answer:

<h2>In prokaryotes both transcription and translation occurs in cytoplasm (they lack true nucleus) while in eukaryotes, transcription occurs in nucleus while translation occurs in cytoplasm.</h2>

Explanation:

1. Prokaryotes do not have nucleus, so both transcription and translation occurs in the cytoplasm, therefor translation start before the completion of transcription.

2. While in eukaryotes, they have true nucleus, and there protein synthesis machinery (ribosomes) and  is situated in the cytoplasm.

So in eukaryotes transcription occurs in the nucleus, and after the completion of transcription, mRNA is processed and finally export into cytoplasm for translation.

3 0
3 years ago
An ecosystem is all the populations of organisms that live together and
KatRina [158]
D; the physixal factors with which they interact
4 0
2 years ago
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Are cells in the epidermis that are part of the immune system.
slavikrds [6]
These are dendritic cells; these are professional antigen-presenting cells located in the skin, mucosa and lymphoid tissues and promote immunity 
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3 years ago
which event can be caused by a landslide , earthquake, or volcanic eruption? A. a tornado B. a hurricane C. a tsunami D. a storm
cupoosta [38]
C. A tsunami is correct i think
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