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Crank
3 years ago
10

How can humans have a positive impact on air quality?

Biology
2 answers:
Vadim26 [7]3 years ago
8 0
Public transportation
const2013 [10]3 years ago
7 0
By using public transportation
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Which of the following choices correctly describes the
DerKrebs [107]
D is the correct answer to this question. Here is a chart of energy transfer.

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2 years ago
Gibberellins were extracted from<br> a) Bacteria<br> b) Virus<br> c) Algae<br> d) Fungi
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Answer:

Gibberellins were extracted from <em>Bacteria</em>

4 0
3 years ago
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When examining rock layers, where do you find the oldest material? Why is this the case?
Basile [38]

Answer:

At the very bottom

Explanation:

When examining a cross section of rock layers, the oldest layer is on the bottom. This is because over time, newer rock layers continued to form on top of the oldest one.

5 0
3 years ago
when you perform a dihybrid cross with two heterozygous individuals for the two traits, what is the expected phenotypic ratio?
Sergeu [11.5K]

Answer:

9:3:3:1

Explanation:

A dihybrid cross tracks two traits. Both parents are heterozygous, and one allele for each trait exhibits complete dominance *. This means that both parents have recessive alleles, but exhibit the dominant phenotype. The phenotype ratio predicted for dihybrid cross is 9:3:3:1. (There's a calculator on google that show the outcomes just to let ya know) hope it's correct .

8 0
3 years ago
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Most animals with backbones, vertebrates, have a similar body plan: skull, ribs, two pairs of limbs, tail. What does this sugges
daser333 [38]

The correct answer is E. Vertebrates are all related to a common ancestor

Explanation:

According to biology and evolution, organisms from different species but that share similarities in morphology (body structures) as well as in genetics often have a phylogenetic relationship which means they descend from the same organism or share a common ancestor. This applies to multiple taxonomical levels including classes such as mammals or birds as it has been proved each of this derived from a common ancestor. Therefore, the similarity in the body structure (morphology) in all mammals suggest vertebrates are related to a common ancestor and as they evolved from this, they share similarities not only in terms of morphology but also in genetics.

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3 years ago
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