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sergey [27]
2 years ago
11

What are the two classes of pure substances?

Biology
2 answers:
Viefleur [7K]2 years ago
8 0

Elements and compounds

Alenkinab [10]2 years ago
5 0

Answer:

Elements and compounds

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What should you do when someone takes things and hoards them?
erastovalidia [21]

focus more on the person and less on the stuff. be there for your loved one. set achievable goals and celebrate the small victories.allow your loved one to feel in control. encourage help-seeking

5 0
3 years ago
Suppose a diploid mosquito is completely heterozygous at all 6 of its chromosomes (2n = 6). How many different combinations of g
Ket [755]

Answer:

8 different combinations of gametes can be produced by this mosquito, assuming no homologous recombination between chromosomes

Explanation:

The mosquito has 6 chromosomes. This means that means it has 3 pairs of homologous chromosomes. Basically, we can assume the number of different gametes by 2 to the power of 3 as their are 3 homologous pairs. This means 2×2×2 which will be equal to the amount of eight. Hence, eight different combination of gametes will be produced.

6 0
3 years ago
When emphysema is a result of a α1-Antitrypsin disorder, assessment data is likely to include which of the following?
Aloiza [94]

Answer:

a. Caucasian Client age younger than 50

Explanation:

<u>α-1 Antitrypsin:</u> In biology, the term "α-1 Antitrypsin" is also referred as "A1AT" and is determined as a serpin that consists of a major "protective effects" against the cigarette smoking and involves the development of emphysema, along with that the patients with the mutations of the "A1AT gene" tends to display an increased risk of emphysema development. However, It is mostly developed in people who are younger in age ranging from 30 to 40 years.

3 0
3 years ago
Animals respond to threats in their environme
dimaraw [331]
I say A not sure tho but I did get a grade 5 in biology
5 0
2 years ago
In a separate study, 68 rock pocket mice were collected from four different, widely separated areas of dark lava rock. One colle
Fudgin [204]

Complete question:

In a separate study, 68 rock pocket mice were collected from four different, widely separated areas of dark lava rock. One collecting site was in Sonora, Mexico. The other three were in Chihuahua, Mexico. Dr. Nachman and colleagues observed no significant differences in the color of the rocks in the four locations sampled. However, the dark-colored mice from the three Chihuahua locations were slightly darker than the dark-colored mice from the Sonora population. The entire Mc1r gene was sequenced in all 68 of the mice collected. The mutations responsible for the dark fur color in the Sonora mice were absent from the three different populations of Chihuahua mice. No Mc1r mutations were associated with dark fur color in the Chihuahua populations. These findings suggest that adaptive dark coloration has occurred at least twice in the rock pocket mouse and that these similar phenotypic changes have different genetic bases.

How does this study support the  concept that natural selection is not random?  

Answer:

The study supports the  concept that natural selection is not random because in different areas with the same or very similar environmental characteristics, the same phenotype was produced by different types of mutations.  

Explanation:

All of the sampled animals are inhabiting dark substrate. Probably animals needed to camouflage to survive. Natural selection must have driven them to produce dark color, similar to the substrate color. So animals from the different regions suffered different mutations that drove them to have almost the same dark fur color. The environmental condition is favoring the same phenotype.

7 0
2 years ago
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