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Marianna [84]
2 years ago
11

Activation energy is only required to start an exothermic reaction. a. True b. False

Biology
1 answer:
Natalka [10]2 years ago
7 0

          The answer is False

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7. Which statement correctly describes how the Sun's energy drives a process within the
abruzzese [7]

Answer:

c

Explanation:

6 0
3 years ago
In Drosophila, straight wings are dominant to curved wings (c), smooth eyes are dominant to sparkling eyes (spa), and tan body i
77julia77 [94]

Answer:

\frac{1}{8}

Explanation:

Straight wings are dominant over curved wings

Let Straight wings : H

curved wings : t

smooth eyes are dominant to sparkling eyes

let smooth eyes = H

spark ling eyes = t

tan body is dominant to ebony body color.

Again; Let tan body color be H

Let ebony color be t

If flies that are heterozygous for all three traits are crossed;

we have HtHtHt × HtHtHt

Then the selected trihybrid traits for the cross will be (HHH,HHt, HtH, Htt, tHH, tHt, ttH, ttt)

We will realize that from the punnet square in the diagram below, the proportion of the offspring would you expect to be heterozygous for all three traits (i.e HtHtHt) is asterisk in the punnet square and will be \frac{8}{64}

= \frac{1}{8}

7 0
3 years ago
A young adult is exposed to a virus that infects and replicates in mucosal epithelial cells of the upper respiratory tract. One
marishachu [46]

Answer:

The CTL has specific receptors that can recognize infected or damaged cells.

Explanation:

The cytotoxic T cells (CTL) is a type of white blood cells that specifically helps in destroying virus-infected cells (also damaged cells and cancer cells).

This type of cells has a special receptor called T-cells receptors (TCR) which ones recognize specific antigens (molecule that stimulate the immune systems because are “strange” to them). Virus inside a cell could bind to a special molecule called class I MHC, this molecule moves the virus to the surface of the cell where it can be recognized by a CD8+ specific antigen-receptor of the CTL.

3 0
3 years ago
ATP stands for Adenosine Triphosphate. The bond between the __________ (first, second, or third) phosphate group and the _______
polet [3.4K]

Answer:

The bond between the _second_________ phosphate group and the third__phosphate group is a high energy bond.

Explanation:

Adenosine triphosphate is a nucleotide with three phosphate groups.  The second and third phosphate groups are bonded by high energy covalent bonds to the rest of the ATP molecule, which consists of a sugar, which is ribose, the first phosphate group, and the nitrogenous base which is adenine. All of the phosphate groups are negatively charged and repel each other, so a high energy covalent bond is necessary to attach these phosphate groups together and keep the forces from pulling them apart.

4 0
2 years ago
Read 2 more answers
How does exercise affect a person's body and homeostasis?
nexus9112 [7]

Answer:

In explanation.

Explanation:

-Exercise effects on the person's body and homeostasis.

Exercise stimulates the sympathetic nervous system and will induce an integrated response from the body; This response works to maintain an appropriate level of homeostasis for the increased demand in physical, metabolic, respiratory, and cardiovascular efforts.

-The Effect of Exercise on Homeostasis

1. Increased Oxygen Consumption.

2. Increased Oxygen Delivery.

3. Increased Body Temperature.

4. Increased Release of Carbon Dioxide.

5. And more.

-More information in this link (if you are looking for homeostasis effects): https://www.livestrong.com/article/369714-how-does-the-body-maintain-homeostasis-in-response-to-exercise/

-More information in this link: https://www.ncbi.nlm.nih.gov/books/NBK482280/

7 0
2 years ago
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