09.10.2021

Many scientific discoveries have contributed to the explanation of how life
began on Earth. Which of the following was NOT used to develop this
scientific theory?

Get Answer

Faq

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?

Step-by-step answer

P Answered by PhD

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):

Step-by-step answer

P Answered by PhD

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

Labels are :

Biology

for six years an artificial fertilizer is used on a apple orchard the orchard is next to a stream which empties in to a slat water bay during the last 5 years resercers have observed an increase in alge in the bay they have also sampled fish populations in the bay each year apex

Step-by-step answer

P Answered by PhD

for six years an artificial fertilizer is used on a apple orchard the orchard is next to a stream which empties in to a slat water bay during the last 5 years researchers have observed an increase in algae in the bay they have also sampled fish populations in the bay each year apex...

Biology

Give examples of myths about aging that many people believe. Why are these myths harmful?

Step-by-step answer

P Answered by PhD

Myths about aging :

Depression and loneliness are normal in older adults. ...

The older I get, the less sleep I need. ...

Older adults can't learn new things. ...

It is inevitable that older people will get dementia. ...

Older adults should take it easy and avoid exercise so they don't get injured.

Myths about aging : Depression and loneliness are normal in older adults. ...The older I get, t

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?

Step-by-step answer

P Answered by PhD

Answer : 900 kg pumpkins

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.

Step-by-step answer

P Answered by PhD

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 are the roles of fungi? Check all that apply. Fungi can be used to develop medicine. Fungi are a food source for animals and humans. Fungi produce oxygen to breathe. Fungi destroy rocks and minerals. Fungi are natural recyclers. Fungi cause infections.

Step-by-step answer

P Answered by PhD

Fungi are a food source for animals and humans. Fungi produce oxygen to breathe. Fungi destroy rocks and minerals. Fungi are natural recyclers.

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.

Step-by-step answer

P Answered by PhD

D. The population density of beetles will decrease.

Biology

Zoe wants to replace the letters on her diagram with labels that describe how the nerves and muscles communicated with each other to trigger her reflexive response. What should her labels be? Should she eliminate any letters from this pathway?

Step-by-step answer

P Answered by PhD

The nerves and muscles communicated with each other to trigger her reflexive response…

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

Step-by-step answer

P Answered by PhD

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.

Example with explaination :