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Alla [95]
3 years ago
14

"Wow" exclaimed Benny. "When I hit this mineral with my rock hammer, it broke into flat planes, in only one direction. It looks

like the layers are peeling off in sheets!"
"That's because it's mica," responded Alice, his lab partner.



Benny and Alice are describing the property of ___________, which is often used to identify specific mineral families.

A) streak
B) hardness
C) cleavage
D) specific gravity
Biology
1 answer:
Basile [38]3 years ago
8 0

Answer:

Im pretty sure its B

Explanation:

hopet this helped! :D

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Most of the downsides of recombinant DNA technology are ethical in nature. Some people feel that recombinant DNA technology goes against the laws of nature, or against their religious beliefs, due to how much control this technology gives humans over the most basic buildings blocks of life.

Other ethical concerns also exist. Some people worry that if companies can pay scientists to patent, buy and sell genetic material, then genetic material could become an expensive commodity. Such a system might lead to people having their genetic information stolen and used without permission. It may sound odd, but such cases have already happened. In 1951, a scientist used unique cells stolen from a woman named Henrietta Lacks to create an important cell line (the HeLa cell line) which is still used in medical research today. Her family did not know about her involuntary donation until after her death, and never received compensation, but others have profited from the use of HeLa cells.

Many people worry about the safety of modifying food and medicines using recombinant DNA technology. Although genetically modified foods seem safe in multiple studies, it is easy to see why such fears exist.
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8 0
3 years ago
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An elephant has 56 chromosomes. Which statement about a zygote of an elephant is true? The zygote has 28 chromosomes, mostly inh
lana66690 [7]
Alright if this works the same way it does with humans (i'm almost totally sure it does but just in case) the answer is: the zygote has 56 chromosomes, 28 inherited from the mother and 28 from the father.
8 0
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Sac-like structures under the plasma membrane are a characteristic of which major group of protists?
uranmaximum [27]
The answer is alveolates. The sac-like structures under their plasma membrane are called alveoli. The alveoli provide support to the plasma membrane. Examples of groups of alveolates are ciliates, such as Paramecium, dinoflagellates, apicomplexa, and foraminifera. They lie under the phylum, Ciliophora.
7 0
3 years ago
Help me pls ASAP !!
sp2606 [1]

Answer:

The answer is a).I think so...Tell me if I'm wrong

8 0
3 years ago
How does adaptation affect the divercity of a species
Brrunno [24]

Answer:

become better fitted to the environment as a result of natural selection. Adaptations generally occur in order to increase the fitness and thus survival of organisms. By being able to adapt to the changing environment, organisms are better able to survive and reproduce.

Many people are under the impression that species require thousands or even millions of years to adapt. This article by Carl Zimmerman explains how evolution can actually occur in surges, a feature of evolution that proves very useful during periods of climate change. It is important to also note that evolution continues to occur long after climate change has stabilized. Delayed reactions continue to change allele frequencies and compositions of populations.

Phenotypic plasticity and the rate of climate change are important factors in determining if a species will be able to adapt.

The phenotypic plasticity of species of brown trout are heritable. If the rate of climate change is slow enough that organisms at the upper range of tolerance can survive, then there is a chance that the species can adapt over time by inheriting this tolerance.

The rate that a species can adapt is related to how drastic of a temperature change it could survive and adapt to. In the case of T. californicus, the fragmented population means that there is large variation in the species (and thus large potential for adaptation), but lower opportunity for adaptation within the individual populations.

A greater amount of variation is indicative of a population that can more readily adapt, as evidenced by this article showing that S. franciscamus,a species of sea urchin, is more likely to be able to adapt to increased carbon dioxide levels than the mussel species M. trossulus over the next 50 years.

A review published this year reiterated the idea that most organisms, marine or terrestrial, have only limited temperature ranges in which they can live, representing their plasticity. Evolutionary changes to this range are considered long-term. In this review, the focus is on Arctic marine organisms, which have extended their temperature ranges to include very cold temperatures.

An organism at the edge of its thermal tolerance may have more difficulty adapting.

(I hope this helps ♡^▽^♡)

5 0
3 years ago
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