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Zepler [3.9K]
3 years ago
8

What change occurs to the pressure and volume of the lungs when the external intercostal muscles contract?

Biology
1 answer:
Liula [17]3 years ago
8 0
C. pressure decreases and volume increases
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Identify the correct number of protons, neutrons, and electrons of an element with the following information
melomori [17]

Answer:

8 protons

8 neutrons

8 eletrons

5 0
2 years ago
Describe the differences between the sporophyte and gametophyte generations of seedless tracheophyte plants and be sure to discu
kykrilka [37]

Answer and Explanation:

Tracheophyte plants, also known as vascular plants, are those that possess a supportive tissue that can also conduct fluids -The Xileme- and another tissue that conducts nutritious elements produced by photosynthesis -The Phloem-. These plants have a root (basically underground), a stem (aerial), and leaves. All of them together form the corm. And the corm counts with these vascular tissues to which we referred before.  

There are different types of Tracheophyte plants, some of them produce seeds to reproduce and disperse -Spermatophyta-  and some others reproduce and disperse by spores -Pteridophyta-. This last seedless group corresponds to ferns and other similar plants.

Pteridophytes characterizes for having a sporophyte that has stems with leaves and a root. It also has primitive xylem composed by tracheids and phloem, both of them formed by vascular bundles located in a central cylinder.

Spores are its dispersion units and are responsible for colonizing new areas. They also constitute the resistance units under extremely unfavorable conditions.  

Their life cycle is composed of the asexual phase (sporophytic phase) and the sexual phase (gametophytic).  

  • The <u>sporophyte</u>, the dominant asexual generation, it is a perennial and diploid structure. Its aerial part might disappear during unfavorable seasons, but it reappears during spring or summer.  The sporophyte is in charge of asexual reproduction
  • The<u> gametophyte</u>, instead, is and haploid structure, ephemeral and must be in the water for its survival, and for sexual reproduction to be successful. In the presence of water, masculine gametophyte -antherozoids- are released and they swim to the archegonium to meet the ovocell. Antherozoids can swim because they have flagella. After fertilization, a new sporophyte is produced.  

3 0
3 years ago
If this is an autosomal recessive disorder, of the following individuals, which is not an obligate carrier?.
earnstyle [38]

Answer:

III-6

Explanation:

Obligate carriers, or obligate heterozygotes, are those individuals that may be unaffected clinically, but must possess a copy of the mutant gene. For autosomal recessive conditions, obligate carriers can be the offspring of a parental mating of two carriers (50% of offspring will also be carriers). They can also be produced by a parental mating of a carrier by an affected individual (50% of offspring will be carriers).

8 0
3 years ago
Which fruit has one seed with grooves on it?
Ronch [10]
<span>The answer is c. peach or nectarine

A peach</span> has only one seed. Its seeds have grooves around it.

Banana has many seeds although very small to notice. A cherry has one or two seeds but it does not have grooves on it. An orange seed has grooves on it but there are a lot of them in one fruit.
6 0
3 years ago
What is a negative effect of photosynthesis for the carbon cycle?
r-ruslan [8.4K]
<span>

with more atmospheric carbon dioxide to convert to plant matter in photosynthesis, place able to grow more. Photosynthesis has no negative effect on Carbon Cycle. Carbon Cycle has a negative effect on photosynthesis.
More Carbon dioxide is not necessarily needed in Photosynthesis. </span>
6 0
3 years ago
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