25.02.2023

Which of the following can have an effect on calf birth weight?
1-climate
2-monitoring
3-microbial enzymes
4-feed brand

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Biology

Select the correct answer. Maria wanted to grow a fern in her backyard. Acting on a suggestion from a friend, she collected brown dots from the underside of a fern’s leaves and then potted them. After a few days, Maria saw small fern leaves erupting from the pot. Which statement explains this phenomenon? A. The fern transitioned from gametophyte generation to sporophyte generation. B. The fern grew as a result of mitosis. C. The fern transitioned from sporophyte generation to gametophyte generation. D. The fern grew to be genetically identical

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Option A : the fern transitined from gametophyte generation to sporophyte generation.

Biology

Leslie argues that an organism called a Euglena is a plant because it is eukaryotic, has a nucleus, makes its own food, and is unicellular. Where is Leslie’s error?

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Leslie argues that an organism called a Euglena is a plant because it is eukaryotic, has a nucleus, makes its own food, and is unicellular. Where is Leslie's error? Plants do not make their own food..

Biology

In school, Brendan has been conditioned to get up from his seat every time he hears the school bell ring. Brendan was sitting at McDonalds eating with friends, when a loud sound similar to the school bell rang from the kitchen. Without even thinking, Brendan jumped out of his seat at McDonalds. Label the following for this scenario: Unconditioned Stimulus (US): Conditioned Stimulus (CS): Unconditioned Response (UR): Conditioned Response (CR):

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In school, Brendan has been conditioned to get up from his seat every time he hears the school bell ring.

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Biology

Which object was developed to help astronomers learn more about the Sun?

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The Parker probe.

Explaination:

Biology

Which could be the location where water emerges from the surface as a spring? 1 2 3 4

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A spring is a natural discharge point of subterranean water at the surface of the ground or directly into the bed of a stream, lake, or sea. Water that emerges at the surface without a perceptible current is called a seep. Wells are holes excavated to bring water and other underground fluids to the surface.

The image shows a cross-section of land scape.

Biology

Suppose there are five genes in pumpkins that work additively to affect pumpkin size. A homozygous lowercase allele pumpkin, aabbccddee, weighs 20 lb. Each capitalized allele additively affects the final phenotype by either adding or subtracting weight from the base pumpkin size. The effect of a single capitalized allele is listed in the table. AlleleEffect A +6 B −2 C −3 D +3 E +4 What would the potential size range be for pumpkin offspring produced from the cross between a parent with genotype aaBbCCDdEe and a parent with genotype AaBBCcddEe?

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Answer : 900 kg pumpkins

Biology

The element phosphorus is located to the right of the element magnesium along the same period in the periodic table. Which best describes the relationship between the elements? A. Magnesium has a larger atomic number. B. Phosphorus has a larger atomic mass. C. Magnesium is in the same category as phosphorus D. Phosphorus has similar chemical properties as magnesium

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B)Phosphorus has a larger atomic mass.

As we move right in the periodic table, both atomic number and atomic mass increases. Magnesium comes under S-block elements (Group 2) and Phosphorus comes under P-block elements (Group-15).

Biology

Using the map provided, rank the following cities in order of earthquake risk from high risk to low risk: Little Rock, AR Miami, FL San Francisco, CA New Orleans, LA

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Rank the following cities in order of earthquake risk from high risk to low risk:

Biology

What change is likely to occur in a population of beetles that suddenly faces predation from an invasive species of frogs? A. The beetles survivorship curve will change type. B. The beetles minimal viable population will decrease. C. The carrying capacity of beetles will increase. D. The population density of beetles will decrease.

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D. The population density of beetles will decrease.

Biology

Using the term water potential, explain why the onions ; (i)gained mass when soaked in dilute solutions of sodium chloride (ii)lost mass when soaked in concentrated solutions of sodium chloride

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when soaked in dilute sodium chloride solution onion gain mass because of the process of osmosis. Explanation: Osmosis is a process when there is movement of water from the region of comparatively higher concentration to the region of lower concentration across in a permeable membrane.