28.02.2023

How the pentadactyl limb has been adapted for different functions in vertebrates

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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

One parrot species that feeds on large seeds nests is in the same tree as a parakeet that feeds on small seeds. How are the birds able to coexist?

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One parrot species that feeds on large seeds nests is in the same tree as a parakeet that feeds on small seeds, they occupy different niches.

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 maltose molecule can be broken down into two individual glucose molecules with the help of an enzyme produced within a cell. Which of the following changes is most likely to slow down this reaction? Adding more maltose molecules Increasing the volume of the cell Adding more of the enzyme Increasing the pH within the cell

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The maltose molecule can be broken down into two individual glucose molecules with the help of an enzyme produced within a cell.

D).increasing the pH with in the cell.

Explaination:

The maltose molecule can be broken down into two individual glucose molecules with the help of an en

Biology

Complete the T-chart by categorizing each statement as something that would most likely be relevant to gene flow or genetic drift. Some answers will fit in both columns depending on the situation. is random is a mechanism for evolution is often related to disasters is also called “migration” deals with movement between populations

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The T-chart by categorizing each statement as something that would most likely be relevant to gene flow or genetic drift. Some answers will fit in both columns depending on the situation. is random is a mechanism for evolution is often related to disasters is also called “migration” deals with movement between populations...

Biology

Which structure could a scientist look for in a plant that would identify it as a club moss rather than a liverwort? phloem spores rhizoids flowers

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A scientist look for in a plant that would identify it as a club moss rather than a liverwort.

Biology

A binary star system is made of stars, one of which is brighter than the other. Astronomers are able to detect the dimmer star because its gravity causes the bright star to . Astronomers can also spot the dimmer star by observing a phenomenon called a(n) binary. This happens when the dim star passes in front of the bright star.

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Astronomers are able to detect the dimmer star because its gravity causes the bright star to . Astronomers can also spot the dimmer star by observing a phenomenon called a(n) binary.

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.

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when soaked in dilute sodium chloride solution onion gain mass because of the process of osmosis.&nb

Biology

how do carbon dioxide and oxygen move in and out of a mesophyll cell? By which process- active transport, diffusion, respiration or transpiration?

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Carbon dioxide with the help of diffusion reach the other cells in the leaf and the oxygen which is produced during the process of Photosynthesis is diffused out of the leaf. Hence, diffusion is the simple process by which gaseous exchange takes place.