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Fittoniya [83]
3 years ago
15

In 1668, Francesco Redi conducted an experiment with jars of meat. This experiment was noteworthy because it

Biology
1 answer:
Stolb23 [73]3 years ago
6 0
In 1668, Francesco Redi, an Italian scientist, conducted an experiment with jars of meat. This experiment was noteworthy because it disapproved the hypothesis of spontaneous generation. He placed fresh meat in each of two separate jars. One of the jars was left open and the other was covered with a cloth. A few days later, the open jar contained maggots while the covered jar contained no maggots, although there were maggots on the exterior surface of the cloth covering the jar.
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A plasmid used in recombinant DNA cloning must contain
oksian1 [2.3K]

Answer:

D. Multiple antibiotic resistance genes.

Explanation:

A plasmid with multiple antibiotic resistance genes is important during cloning as it helps in selectivity of the specific clones during transformation of bacteria.  

7 0
3 years ago
In a fish species, the number of eggs that hatch and survive for one year varies depending on the number of eggs that were produ
Alenkinab [10]

Answer:

C. The chance of survival decreases when there is intraspecific competition for resources among surviving yearlings

Explanation:

The survival rate of the offspring of the fish species will decrease as a result of the huge number of eggs produced giving rise to overpopulation. Pressure will be on the limited available resources. As a result of this, Intraspecific competition would occur as members of the same fish species would compete for the limited resources.  

Interference and exploitation competition are two types of Intraspecific competition that can reduce the population size of the fish species.

For Interference competition, the dominant and stronger members would secure adequate supply of the limited resources to  detriment of the weaker and less dominant ones. This leads to the death of those members that are weak to compete successfully, thereby leading to a reduction in population size.

In exploitation competition, it involves all individual members of the fish species sharing the limited resources equally, while none of them gets an adequate amount. With time, a great size of the population decrease would be noticed when compared to that of Interference competition.  

8 0
3 years ago
With examples, discuss the role of sensory memory on long term recall
igor_vitrenko [27]

Explanation:

How Does Sensory Memory Work?

During every moment of your existence, your senses are constantly taking in an enormous amount of information about what you see, feel, smell, hear, and taste. While this information is important, there is simply no way to remember each and every detail about what you experience at every moment. Instead, your sensory memory creates something of a quick "snapshot" of the world around you, allowing you to briefly focus your attention on relevant details.

Types of Sensory Memory

Experts also believe that different senses have different types of sensory memory. The different types of sensory memory have also been shown to have slightly different durations.

Iconic memory, also known as visual sensory memory, involves a very brief image. This type of sensory memory typically lasts for about one-quarter to one-half of a second.

Echoic memory, also known as auditory sensory memory, involves a very brief memory of sound a bit like an echo. This type of sensory memory can last for up to three to four seconds.

Haptic memory, also known as tactile memory, involves the very brief memory of a touch. This type of sensory memory lasts for approximately two seconds.

5 0
3 years ago
The sternocleidomastoid muscle extends from the mastoid process of the temporal bone to the sternum and medial clavicle. When bo
grandymaker [24]

Answer:

A Origin

Explanation:

Sternocleidomastoid is the muscle found in the cervical and it’s the largest. It is responsible for the rotation and flexibility of the neck and is a very powerful and tissue-rich muscle.

The sternocleidomastoid muscle extends from the mastoid process of the temporal bone to the sternum and medial clavicle. When both sternocleidomastoid muscles contract, the head is flexed. The end of the muscle called ORIGIN connects to the sternum.

4 0
3 years ago
If you were trying to build a soundproof room, which of the following materials would you choose in order to absorb the most sou
gulaghasi [49]

Coefficients of Absorption for Common Materials

Perforated acoustic ceiling material 60%

Heavy curtains 50%

Carpeting 20%

Wood 5%

Plaster 3%

Clay tile 3%

Concrete 2%

The answer is C. Heavy curtains

7 0
3 years ago
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