Answer:
B. Hominins evolved an opposable thumb that enabled hands to grasp objects.
Explanation:
Prehistoric hominids evolved opposable thumbs earlier than bipedal walking. The opposable thumbs have been critical during evolution because this position enables the digits to grasp and handle objects.
Answer:
There are several factors that can contribute to the effect an environmental toxin has on the human body. They are:
- Form and innate chemical activity
- Dosage, especially dose-time relationship
- Exposure route
- Species
- Life stage, such as infant, young adult, or elderly adult
- Gender
- Ability to be absorbed
- Metabolism
- Distribution within the body
- Excretion
- Health of the individual, including organ function and pregnancy, which involves physiological changes that could influence toxicity
- Nutritional status
- Presence of other chemicals
- Circadian rhythms (the time of day a drug or other substance is administered)
Answer:
They are both explanations of the rate of evolutionary change.
Explanation:
Gradualism is that evolution occurs at a slow and steady pace. Gradualism brings small variation to particular species, it occurs over a long period of time.
In punctuated equilibrium, change comes in spurts. Punctuated Equilibrium is the time in which species are stable but now and then there is a disruptive event that promotes frequent changes.
Gradualism and punctuated equilibrium are theories of evolution that both rely on natural selection and describe change in species over long periods of time. They differ in the rate and frequency of that change, with gradualism suggesting a slow, steady change and punctuated equilibrium suggesting rapid, drastic shifts followed by periods of stability.
Both gradualism and punctuated equilibrium are theories in evolutionary biology that describe how species evolve over time. They share commonalities in that they both rely on the process of natural selection, and they both describe change in species over long periods of time. However, they differ in the rate and consistency of that change. Gradualism suggests that evolution occurs slowly and consistently, while punctuated equilibrium proposes that evolution happens in fast, significant changes followed by long periods of stability.
For instance, the theory of gradualism is often compared to the slow but steady change associated with erosion. On the other hand, punctuated equilibrium is likened to a natural disaster leading to a sudden, significant shift in an ecosystem. Despite these differences, it's crucial to realize that both theories are part of the broader understanding of evolution and aim to explain the complex and dynamic nature of life on Earth.
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B) The polarity of the water molecule helps it to cohere to nearby water molecules, forming a skin over it
C) The weight of the water molecule helps it to cohere to nearby water molecules, forming a skin over it