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How many sperm cells are created from the process of meiosis

Lorico [155]

While mitosis produces 2 daughter cells from each parent cell, meiosis results in 4 sex cells, or gametes in males and 1 in females. Unlike the cells created by mitosis, gametes are not identical to the parent cells. In males, meiosis is referred to as spermatogenesis because sperm cells are produced.

6 0

3 years ago

What organisms can get up to 10 centermeters in size

Svetach [21]

<h2><u>Answer:</u></h2>

A Single-Celled Organism

<h2><u>Explanation:</u></h2><h3><u></u></h3>

The giants of the deep are so-called xenophyophores, sponge-like animals that—like amoebas—are made of just one cell. They were found during a July research expedition run by the Scripps Institution of Oceanography in La Jolla, California.

The animals are about four inches (ten centimeters) long—among the largest single-celled organisms known to exist.

The creatures were discovered at depths of 6.6 miles (10.6 kilometers). That breaks a previous record for xenophyophores found in the New Hebrides Trench at 4.7 miles (7.6 kilometers).

Xenophyophores represent, <u>"one of the few groups of organisms found exclusively in the deep sea,"</u> said Lisa Levin, a Scripps oceanographer who studied the expedition's data.

<u>"If any creatures should be able to live at the ocean's greatest depth, then xenophyophores certainly should be among them."</u>

The Mariana xenophyophores were seen in footage from Dropcams, free-falling devices equipped with lights and digital video that were developed by the National Geographic Society. (The Society owns National Geographic News.)

Protected by thick walls of pressure-resistant glass, the Dropcams were baited to attract whatever marine life might be lurking in the deep. Expedition scientists also saw, for instance, the deepest-swimming jellyfish to date. (Watch a video of the expedition.)

<u>"The deep sea is the largest biome on Earth and holds much of the diversity on the planet—[yet it's still] largely undescribed,"</u> Levin said in an email to National Geographic News.

(Also see, <u>"Pictures: Hard-to-See Sea Creatures Revealed."</u>)

According to Jon Copley, a marine biologist at the U.K.'s University of Southampton, <u>"many of the major discoveries in deep-sea biology have come from making direct observations at the seafloor."</u>

<u>"The Dropcam is a great tool for the future, because it can help us see more of what's down there for less cost than using ROVs or submersibles,"</u> he said via email.

For instance, <u>"finding xenophyophores far deeper than before shows how much we still have to learn about our oceans depths and their inhabitants."</u>

Tullis Onsott, an expert in deep-sea microorganisms at Princeton University, also called the xenophyophore discovery, <u>"fantastic."</u>

7 0

3 years ago

Fossils show how the complexity of living organisms has changed over time. Gerobatrachus hottoni was a unique organism that live

lara31 [8.8K]

The correct answer is transitional.

Gerobatrachus refers to an extinct genus of amphibamid temnospondyl, which thrived in the initial Permian, that is, about 290 mya, in the region, which is now known as Baylor County, Texas. The transitional form of fossils are those that demonstrate the intermediate form between the two distinct living species, it could be in a form of an ancestor and its descendants. It is considered that the frogs and salamanders have evolved from a common ancestor of primitive amphibian tetrapod subclass known as Temnospondyli.

4 0

2 years ago

An animal that has thick fur, webbed flippers and blubber to keep it warm would probably live in which of the following biomes:

pav-90 [236]

Answer:

d

Explanation:

4 0

2 years ago

Read 2 more answers

Please help! (50 points)

RoseWind [281]

Answer:

Tofu and soy oil come from soy bean plants that are grown on farms. Many farmers grow soy beans as cash crops that they can send to places such as tofu processing plants. Soybean plants are legumes. Legumes have bacteria on nodules which are on the roots of the plant. The bacteria on the nodules takes nitrogen from the air and fixes it into the soil, so that other plants that require nitrogen can use it as well.

This nitrogen cycle that was breifly discussed above is used in what farmers call a crop rotation. Farmers use soybeans and other legumes in roatations with grass crops such as corn or wheat. Grass crops are unable to take their own nitrogen from the air so they either need the nitrogen in the soil that the legumes provide for them in a crop rotation or they need a chemical fertilizer containing nitrogen. Many farmers choose to use both. Most farmers use a two or four year rotation on their fields. In a two year rotation a farmer will alternate a year of a legume such as soybeans and a year of a grass crop such as corn. In a four year rotation a farmer will alternate back and forth between legumes and grass crops just as in a two year rotation, but instead he will use four differnt crops. For example, a farmer may plant a rotation of soybeans, corn, alfalfa (a legume), then wheat (a grass).

4 0

2 years ago