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3 years ago

Bees can pollinate all types of flowers.

Biology

1 answer:

saul85 [17]3 years ago

6 0

Answer:

Yes,it's clear that bees play a vital role in food production. They are excellent pollinators! Most food crops—including fruits, vegetables, nuts, and seeds—must go through pollination. That's the process of moving tiny pollen cells between plants to help them make seeds.

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How do diseases that affect one species, impact the entire ecosystem?

Inessa [10]

How does disease affect the ecosystem? I don’t know... Just kidding Explanation:
Most ecosystems include viruses, bacteria, fungi, and parasites that cause disease. ... Where ecosystems are not healthy, due to a loss in biodiversity and threats such as habitat loss, climate change, pollution, or invasive species, wildlife and ecosystems are more vulnerable to emerging diseases.

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3 years ago

The nurse is caring for a client who had a permanent pacemaker surgically placed and is now ready for discharge. What statement

chubhunter [2.5K]

Answer:

Option D

Explanation:

Options for the question are -

a) “I will call the doctor if my incision becomes swollen and red.”

b) “I will check my pulse every day and report to the doctor if the rate is below the pacemaker setting.”

c) “I will avoid any large magnets that may affect my pacemaker.”

d) “We will be getting rid of our microwave oven so it will not affect my pacemaker.”

Solution -

The statement as stated in option D signifies the lack of knowledge of patient about the pacemaker and precautions to be taken while using it.

In general all the pacemakers have efficient mechanism to protect the device from electrical disturbance received from other electrical device specially the household devices such as refrigerator, heater, motors, microwave etc. However, protection is required from magnetic fields and magnets. Thus option C is a correct statement. Option A and B depict valid general precautions and check to be taken care of while using pacemaker.

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3 years ago

The type of credibility when a speaker establishes common ground with the audience

weqwewe [10]

Answer: derived credibility

Derived credibility is the credibility a speaker has developed in delivering speeches. The speaker establishes common ground with his audience, supports an argument with believable pieces of evidence, and professionally presents a well-delivered speech. He is an effective spokesperson because he possesses the so-called “Three C’s of Credibility.” Compassionate, Competent and Confident.

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4 years ago

List the names of soil horizons A, B, and C in order from top to bottom.

VMariaS [17]

O) Organic Matter
A) Surface soil
B) Subsoil
C) Parent Rock
R)Bed rock

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4 years ago

Define monohybrid cross with explanation

UkoKoshka [18]

Answer: A monohybrid cross is a breeding experiment between P generation (parental generation) organisms that differ in a single given trait. The P generation organisms are homozygous for the given trait. However, each parent possesses different alleles for that particular trait. A Punnett square may be used to predict the possible genetic outcomes of a monohybrid cross based on probability. This type of genetic analysis can also be performed in a dihybrid cross, a genetic cross between parental generations that differ in two traits.

Traits are characteristics that are determined by discrete segments of DNA called genes. Individuals typically inherit two alleles for each gene. An allele is an alternate version of a gene that is inherited (one from each parent) during sexual reproduction. Male and female gametes, produced by meiosis, have a single allele for each trait. These alleles are randomly united at fertilization.

Explanation: The single trait being observed is pod color. The organisms in this monohybrid cross are true-breeding for pod color. True-breeding organisms have homozygous alleles for specific traits. In this cross, the allele for green pod color (G) is completely dominant over the recessive allele for yellow pod color (g). The genotype for the green pod plant is (GG), and the genotype for the yellow pod plant is (gg). Cross-pollination between the true-breeding homozygous dominant green pod plant and the true-breeding homozygous recessive yellow pod plant results in offspring with phenotypes of green pod color. All genotypes are (Gg). The offspring or F1 generation are all green because the dominant green pod color obscures the recessive yellow pod color in the heterozygous genotype.

Monohybrid Cross: F2 generation

Should the F1 generation be allowed to self-pollinate, the potential allele combinations will be different in the next generation (F2 generation). The F2 generation would have genotypes of (GG, Gg, and gg) and a genotypic ratio of 1:2:1. One-fourth of the F2 generation would be homozygous dominant (GG), one-half would be heterozygous (Gg), and one-fourth would be homozygous recessive (gg). The phenotypic ratio would be 3:1, with three-fourths having green pod color (GG and Gg) and one-fourth having yellow pod color (gg).

What Is a Test Cross? How can the genotype of an individual expressing a dominant trait be determined to be either heterozygous or homozygous if it is unknown? The answer is by performing a test cross. In this type of cross, an individual of unknown genotype is crossed with an individual that is homozygous recessive for a specific trait. The unknown genotype can be identified by analyzing the resulting phenotypes in the offspring. The predicted ratios observed in the offspring can be determined by using a Punnett square. If the unknown genotype is heterozygous, performing a cross with a homozygous recessive individual would result in a 1:1 ratio of the phenotypes in the offspring.

Using pod color from the earlier example, a genetic cross between a plant with recessive yellow pod color (gg) and a plant heterozygous for green pod color (Gg) produces both green and yellow offspring. Half are yellow (gg), and half are green (Gg). (Test Cross 1)

A genetic cross between a plant with recessive yellow pod color (gg) and a plant that is homozygous dominant for green pod color (GG) produces all green offspring with heterozygous genotype (Gg). (Test Cross 2)

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3 years ago