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Alina [70]
3 years ago
9

_______ are thought to have been present before vertebrates.

Biology
1 answer:
Verizon [17]3 years ago
8 0

Answer:

invertebrates i guess

Explanation:

hope it helped!!!

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How can I set up a wildflower classification key?
s344n2d4d5 [400]

Answer:

There are 3 methods to set up a wildflower classification means discovering a new flower. Those methods are discussed below in the explanation section.

Explanation:

Method one (Identification tools using):

  1. Search the about of the flower in the flower dictionary or flower database.
  2. Use any app which can identify flower such as Flowerchecker, Naturegate, etc.
  3. Take photos of the plant and post it on Flicker to get more information.
  4. Try google photos for searching about the plant by its picture.

Method two( Measuring the physical character of the plant):

  1. Measure the overall height of the plant.
  2. Measuring the width of the plant.
  3. Look at the flower to check how the flower is arranged on the stem.
  4. Count the petal number of the flower.
  5. Identify the color of the petals.
  6. Check the shape and texture of the stem.
  7. Check the shape, size, and arrangement of the leaves in the plant.
  8. Use this collected information to identify the flower in a plant database or encyclopedia.

Method three (Identifying the Flower’s Location and Blooming Time):

  1. Use the climate and terrain to determine the type of the flower.
  2. Observation of the factors in the geographic location to identify the flower.
  3. Find out the time of year when the flower bloomed.
  4. Identify the flower in an online database or encyclopedia using the collected information.

By doing this, you can set up a wildflower classification key and can find out the kingdom, family etc of the flower.

3 0
3 years ago
What perspective maintains that generalized anxiety disorder develops as a result of exposure to threatening environments?
ikadub [295]

Answer:

sociocultural

Explanation:

Sociocultural maintains that generalized anxiety disorder develops as a result of exposure to threatening environments.

Sociocultural means combining social and cultural factors.

The focus of study in anthropology is an example of sociocultural.

The theory of sociocultural perspective explains how behaviors of individuals are affected by their social and cultural factors.

5 0
3 years ago
Which Hormone is least active while ovulation is occurring?
Troyanec [42]

Answer:

B estrogen   (I think)

6 0
3 years ago
Read 2 more answers
What term refers to multinucleated cells that form when many host cells fuse together during infections?
stiks02 [169]

Answer:

The correct option is : d. Syncytia

Explanation:

Syncytia are the multinucleated cells formed from multiple fusions of the uninuclear cells.

During a infection, an infected cell fuse together with the neighboring host cells, leading to the formation of large multinucleated cells, called syncytia.

Viruses like herpesviruses, induce the formation of multinucleated syncytia cells.

7 0
3 years ago
Tapping the patellar tendon will usually result in a/n:
eimsori [14]

Answer:

The correct answer is B. Tapping the patellar tendon will usually result in a spinal reflex.

Explanation:

The patellar reflex is the involuntary contraction of the quadriceps femoris muscle by flexion of the patellar tendon. It is a reflex of spinal or stretching type. It was discovered, studied and first reported in 1875 by William Erb.

By striking the patellar tendon, the leg is extended as alpha motor neurons direct a nerve impulse to the quadriceps femoris muscle. The femoral nerve, responsible for such reflex, extends throughout the thigh and its synapses are found in the lumbar spinal nerve 2 to 4 of the spinal cord. Therefore, this movement is involuntary and responds to a need for automatic regulation of body muscles.

7 0
3 years ago
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