All categories

3 years ago

If logging operations are conducted on a hillside near a river, the operations will most likely -

Biology

1 answer:

Archy [21]3 years ago

3 0

Answer:

D. decrease the amount of erosion along the hillside

Explanation:

When logging operations are conducted on a hillside near a river, the operations will decrease the amount of erosion along the hillside because the tree's root hold soil particles and does not allow them to erosion. We can see in many region that there is presence of vegetation on the bank of river or stream in order to prevent erosion of soil so that's why we can say that logging operations causes decrease erosion along hillside.

You might be interested in

In animals, the inability to make the pigment melanin results in albinism, a recessive autosomal condition. Two unaffected paren

Fittoniya [83]

Answer: 1/16, or approximately 6.25% (see explanation below)

Explanation:

Answering this question requires two steps.

First, we need to figure out the probability that this couple will have a child with albinism in the first place. We know the following:

- Both parents are unaffected.

- The couple has already had one affected child.

- Albinism follows an autosomal recessive inheritance pattern.

Let ( M = normal gene ) and ( m = mutated gene ). Since the condition is recessive, the affected child can be assumed to have a “mm” genotype. Barring the possibility of a de novo mutation (which are assumed to be rare), the affected child must have inherited one ”m” allele from each parent. Since both of them are unaffected, however, we can assume that they are both carriers (genotype “Mm”). In conclusion, 1/4 of their offspring (25%) for any given pregnancy may be expected to have albinism. See the resulting Punnett square:

| M | m

M | MM | Mm

m | Mm | mm

Note that the question asks about the probability that not one but two consecutive births result in affected children. Since it can be assumed that both events are independent (meaning: the outcome of a pregnancy does not influence the outcome of following ones), we may apply the rule of multiplication for probabilities. The final answer is therefore 1/4 * 1/4 = 1/16.

7 0

3 years ago

_____ communicate information in the opposite direction, from the brain and nervous system to muscles and glands.

yulyashka [42]

Answer:

The correct answer would be efferent neurons.

Efferent neurons are the motor neurons which communicate information in the opposite direction as compared to the afferent neurons, that is, they communicate information or response impulses from the brain or central nervous system to the muscles or glands.

The response impulses results in the movement of the muscles or activation/deactivation of certain gland

In contrast, afferent neurons are the sensory neurons which carry impulses from the receptors to the central nervous system.

5 0

3 years ago

The various taxonomic levels (e.g. genera, classes, etc.) of the hierarchical classification system differ

Westkost [7]

Answer:

Explanation:

The taxonomic classification has eight levels, they go from the more inclusive to the more exclusive.

The eight categories are: Domain which is the most inclusive level, that is to say, that the largest number of individuals are included in this level. There are three domains according to the cells types, and where they live. They are the Eukarya, Bacteria and Archaea. Domains are divided into kingdoms, they are the Plantae, protista, Eubacteria, Archaebacteria, Animalia and Fungi. After kingdoms the Phylum category comes, following Phylum is Class, various classes that are related will form a Phylum. The next category is Order, order is divided into Family, families are broken into Genus, where species are closely related between each other and finally the last category is Especies identifier, in this group there are unique characteristics that will identify a specie. With this classification we can see that we go from global groups to more specifics ones as the classification avances.

8 0

3 years ago

explain how repressible and inducible operons differ and how those differences reflect differences in the pathways they control

Sonja [21]

Answer

Operons are cluster of coordinated genes, including structural genes, an operator gene, and a regulatory gene.

Explanation:

In the The repressible operons, The transcription is usually on and repressor is in inactive form, So the specific genes are transcribed. While a regulatory molecule act as corepressor and binds to repressor protein to activate it. The repressor protein cause the inactivation of repressible operon (as the name indicate). E.g., Tryptophan Repress the trp operon.

A high level of product act as regulatory molecule (Corepressor) and turn off the operon, So anabolic pathways or synthesis of essential components are controlled by repressible operon.

In the Inducible operons, the transcription is usually off and repressor is in active form. So there is no transcription of genes. Specific Metabolite cause the activation of operon e.g lactose cause the induction of lac operon.

As a metabolite induces the operon, So they control the Metabolic pathways or breakdown of a neutrient.

7 0

3 years ago

Which applies to an earthworm but not to a hydra?

kow [346]

I think the hydra lacks the specialized cells for touch and chemical detection. On the other hand earthworms have touch, light, vibration and chemical receptors along the entire body surface. Both of them are invertebrates (those animals without a backbone), they include insects, worms, jelly fish, spiders among other animals.

3 0

3 years ago