How have human activities affected the distribution of fossil fuels on Earth?

Biology

1 answer:

Archy [21]3 years ago

8 0

Answer:

human activities affect fossil fuels on Earth because they can cause damage to the environment

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Rocky's class recently got pet turtles. When putting together the habitat, decomposers were added to

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I’m feeling that it’s D.

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Imagine that part of a population of South American finches is blown by a storm onto an island far offshore and manages to survi

lina2011 [118]

Answer: The observation "A" leads us to conclude that the finches populations are from two different species

Explanation:

According to the biological concept of species, a set of individuals are from the same species if they are able to reproduce and leave fertile offspring. This is key so one species can be successful and perpetuate through time. If they cannot leave descendants, then the species will be extinct. However, it’s possible that two individuals from different species mate and have descendants, but they cannot leave fertile offspring. When they are from different species, the offspring will be sterile and it is called a hybrid.

In the case of the South American finch, the island's finch population and mainland's finch population belong to different species because their offspring is sterile. To have different features, as different feather's color, or to have other dietary preference is not enough to say that they are different species. This is because within the same species, individuals can have variations. For example, we can different eye color and belong to the same species.

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3 years ago

Density is mass per unit of volume. Which pair of lab instruments would a student use to measure the density of seawater?

algol [13]

Answer:

A scale and a tape measure.

Explanation:

Use the tape measure to get the volume and the scale to get the mass.

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3 years ago

1. In a population of 200 field mice, 98 mice are homozygous dominant for brown fur (FF), 84 mice are heterozygous (Ff), and 18

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A.
The genotype frequencies can be determined by dividing the number of individuals with a genotype by the total number all the individuals.
FF genotype frequency:
98÷200=0,49. There are approximately 5 homozygous dominant mice in 10.
Ff genotype frequency:
84÷200=0,42. There are approximately 4 heterozygous mice in 10.
ff genotype frequency:
18÷200=0,09. There are approximately 1 homozygous recessive mouse in 10.

B.
To determine the frequency of an allele we can divide the number of times that the allele appears by the total number of alleles.
F allele frequency:
 $\frac{(98*2)+84}{400}$ =0.7
There are 7 F alleles in 10 random alleles.
f allele frequency:
$\frac{84+(18*2)}{400}$ =0.3
There are 3 f alleles in 10 random alleles.

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3 years ago

What happens to the concentration of oestrogen at ovulation?

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Answer:

When oestrogen rises to a high enough level it causes a surge in LH from the pituitary which causes ovulation where an egg is released from the follicle (Day 14 of the cycle). The follicle becomes the corpus luteum and this produces oestrogen and progesterone which inhibit FSH and LH production by the pituitary.

Explanation:

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