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Ne4ueva [31]
3 years ago
15

How long has earth been in it’s current era

Biology
1 answer:
Alla [95]3 years ago
6 0

Answer: Such constant change has characterized Earth since its beginning some 4.5 billion years ago. From the outset, heat and gravity shaped the evolution of the planet. These forces were gradually joined by the global effects of the emergence of life.

Explanation:

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Pathogens are transmitted in only two ways: by direct contact and by vectors.
Marina86 [1]

Answer: False

Explanation:

Pathogens can be transmitted in many ways. It can spread by direct contact, indirect contact, or by vectors.

The mode of transmission can be skin contact, airborne particles, touching a surface, bodily fluids, touched by an infected person.

The mode of transmission can be vector that carries disease and helps in disease transmission.

So, the pathogens can be transmitted by direct contact, indirect contact or by vectors and by many more ways.

4 0
3 years ago
a human fetus develops at the mother’s body temperature. at birth, most newborns experience a drop in temperature, and their bod
Sloan [31]

A human fetus develops at the mother’s body temperature. At birth, most newborns experience a drop in temperature, and their bodies must quickly do something about it. What they do is the same thing a hibernating mammal does as it rouses itself from its winter "snooze." During hibernation, an animal’s body temperature is low. In order to move about and take care of itself once awake again, the animal that has been hibernating must raise its body temperature. (William k. Purves et al., life: the science of biology) The definition is the primary pattern of organization in this passage.

This passage is explaining the process of hibernation and its importance in the animal life cycle.

To learn more about hibernation here

brainly.com/question/2594381

#SPJ4

3 0
1 year ago
Which of the following statements is/are consistent with the fluid-mosaic model of membranes? (Select all that apply.) The lipid
vfiekz [6]

The correct answers are: The lipid bilayer and proteins exist side by side without covalent bonds between them and  Some proteins and lipids undergo lateral diffusion along the inner or outer surface of the membrane

According to fluid mosaic model, there is a lipid bilayer that gives fluidity and in which the protein molecules are embedded.  

The membrane is mosaic because there is a pattern of different types of molecules that are put together. Molecules are constantly moving in two dimensions.

Components of the cell membrane include:

• Phospholipids – Form a bilayer  

• Cholesterol –improves stability and reduce fluidity

• Proteins –integral (transmembrane) or peripheral  

• Sugars-usually attached to proteins.

4 0
3 years ago
What characteristics do monocots have? What characteristics do dicots have?
LuckyWell [14K]

Answer: MONOCOT

1) seeds with one cotyledon.

2) the plants have fibrous root system

3) leaves have parallel venation

4) the petals of flowers are trimerous(3 petals)

   DICOT

1) seeds with two cotyledon.

2) the plants have taproot system.

3) leaves have reticulate venation

4) the petals of flowers are pentamerous (5 petals)

Explanation:

5 0
3 years ago
Changes to land that contain some soil and life
Sophie [7]

Answer:

D, Secondary Succession

Explanation:

The answer is D because a habitat is an organism's home, a niche is the organism's role, and primary succession is when there are changes to land that contain no soil or life. Hope this helped :3

7 0
3 years ago
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