What was a common life form during the Cambrian period?

Answers

Answer 1

Answer: At the beginning of the Cambrian Period, about 542 million years ago, there were sea creatures like hydras, jellyfish, sponges and seaweed living in the oceans, but only one-celled algae on land yet. Small arthropods like beetles were beginning to appear, and by 540 million years ago the first land plants evolved from the land algae. These plants were like modern moss.
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How is a bone cell and animal cell similar?
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Which of the following enzymes is specific for proteins?A. dextrinase B. amylase C. trypsin D. lipase
n the F2 generation of Mendel’s crosses, all plants had the dominant trait. half of the plants had the dominant allele. all plants had both the dominant and recessive alleles. one in four plants had two alleles for the recessive trait.
Katherine owns the trendy boutique where Clara works as a shop assistant. Deanne loves the clothes in Katherine's boutique and shops there often. Which of these three people is a consumer? Select one of the options below as your answer:a. Katherine b. Clara c. Deanne

Leaves appear green because the green portion of the light that strikes them is _____.a. changed to heat
c. destroyed
b. absorbed
d. reflected

Answers

D. Reflected
Whatever color your eye sees is the reflected light. So white, all colors reflected and black, all colors absorbed

Answer:

reflected

Explanation:

All life on earth can be classified into how many kingdoms? 1 or 2 3 or 4 5 or 6 7 or 8

Answers

On Earth there are six kingdoms: Plants, Animals, Fungi, Archaebacteria, Protists, and Eubacteria.

The answer is six.
1.Archaeobacteria
2.Eubacteria
3.Protoctista
4.Fungi
5.Plantae
6.Animalia

Organisms need nutrients in order to?

Answers

organisms need nutrients in order to living organism

Organisms need nutrients to survive, to grow and develop and even undergo reproductive processes.

He metabolic reaction that occurs in the cells of all living organisms is: C6H12O6 + 6O2 → 6H2O + 6CO2 Which process involves a reaction similar to this reaction?

Answers

Answer:

burning of fossil fuels

Explanation:

Answer:

photosynthesis

Explanation:

the equation for photosynthesis is

6CO2 + 6H20 → C6H12O6 + 602

During periods of stress, the brain signals the adrenal glands to produce this hormone that stimulates the sympathetic nervous system:

Answers

Final answer:

In times of stress, the brain stimulates the adrenal glands to produce hormones including epinephrine and norepinephrine, which aid in dealing with the 'fight or flight' response. The adrenal cortex also manages longer-term stress responses through the production of corticosteroids such as aldosterone in response to ACTH.

Explanation:

During times of stress, the brain activates the sympathetic nervous system and signals the adrenal glands to produce hormones that assist in managing this stress. Among these hormones are epinephrine and norepinephrine (also known as adrenaline and noradrenaline), which are produced by the adrenal medulla. These hormones regulate the acute 'fight or flight' response to stress, with physiological effects such as increased heart rate, blood pressure, and blood glucose levels. Acetylcholine stimulates the release of these hormones in response to neural impulses from the hypothalamus.

Meanwhile, the adrenal cortex is involved in managing long-term stress responses through the production of corticosteroids, stimulated by the hormone adrenocorticotropic hormone (ACTH). ACTH is triggered by Corticotropin-releasing hormone (CRH) from the hypothalamus. These corticosteroids, such as aldosterone, can influence fluid retention and blood volume, thus affecting blood pressure.

Learn more about Stress response hormones here:

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To classify an organism a scientist finds in the field, which of these will the scientist first compare to other known organisms?A. Dietary habits
B. Ecological niche
C. Physical structure
D. Reproductive method

Answers

The answer is C. Physical structure.

Different species can share dietary habits, ecological niches, and reproductive method although they are not related. So, classifying organisms based on these features is not helpful a lot. It is known that different species differ in DNA sequence. Since physical structures are determined by DNA sequences, physical structures could show in first sight difference between species. Therefore, to classify organism found in the field, the scientist will start from comparing its physical structures to the other known organisms.

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